I own an iSound Portable Power Max charger http://www.amazon.com/i-Sound-Portable-Power-iPhone-BlackBerry/dp/B00439G3WS and just realized that it does NOT work with the Prime. Anyone know of any similar products that do work?
Edit: I found something that will charge the Prime, however, it's neither inexpensive nor small.
http://www.sejats.com/12000-mAh-Solar-Battery-Charger-for-ASUS-Transformer-Tablet-ZERO-1-ASTRFORM.htm
Well that sucks! I just bought a Motorola P893 to have back up for my Razr and was hoping to be able to use it for my Prime as well (when I get it)... Does your charger not come with the appropriate connectors? Mine probably won't work either, and its only like 8,000 mAh anyways, probably not enough for a tablet???
Anything that can plug into a USB port works with it. I've tried it with 4 different phones and an iPad 2. They all work except for the Prime.
I have a few newtrent devices but they won't do anything but a trickle charge when the prime is shutoff, if on it draws more than the newtrent imps can provide (5V).
I don't know of any off the top of my head, but the input the prime is looking for is 15V 1.2Amps, find a battery pack that can provide that and my guess is that it should charge the prime.
Prime needs a USB3 charger, it seems. Who knows if they exist...
copland007 said:
I have a few newtrent devices but they won't do anything but a trickle charge when the prime is shutoff, if on it draws more than the newtrent imps can provide (5V).
I don't know of any off the top of my head, but the input the prime is looking for is 15V 1.2Amps, find a battery pack that can provide that and my guess is that it should charge the prime.
Click to expand...
Click to collapse
Thanks. I found something that will charge the Prime, however, it's neither inexpensive nor small.
http://www.sejats.com/12000-mAh-Solar-Battery-Charger-for-ASUS-Transformer-Tablet-ZERO-1-ASTRFORM.htm
Here's a review of one that should work:
http://www.androidpolice.com/2012/0...c-of-portable-chargers-with-a-price-to-match/
Realistically, anything that was designed to charge a cell phone or iPod-sized device won't work well for the TF Prime as it will take too long to recharge your tablet to be really useful.
Also, the Prime's battery is significantly larger than most mobile backup batteries so you won't be able to get a full charge. At best you will be able to recharge your battery to around 25%, but in most cases you will probably get a lot less.
TalynOne said:
Here's a review of one that should work:
http://www.androidpolice.com/2012/0...c-of-portable-chargers-with-a-price-to-match/
Click to expand...
Click to collapse
I'm under the impression that the TF Prime looks for a higher voltage -- 15V to start charging, not just a higher current at 5V.
NeoteriX said:
I'm under the impression that the TF Prime looks for a higher voltage -- 15V to start charging, not just a higher current at 5V.
Click to expand...
Click to collapse
The solar charger I posted has a button for 5V, 9V, 12V, or 16V settings. It will charge the Prime at 12V and 16V.
almightywhacko said:
Realistically, anything that was designed to charge a cell phone or iPod-sized device won't work well for the TF Prime as it will take too long to recharge your tablet to be really useful.
Also, the Prime's battery is significantly larger than most mobile backup batteries so you won't be able to get a full charge. At best you will be able to recharge your battery to around 25%, but in most cases you will probably get a lot less.
Click to expand...
Click to collapse
Many of these chargers work on the similarly-sized iPad, though.
Buddy Revell said:
Many of these chargers work on the similarly-sized iPad, though.
Click to expand...
Click to collapse
That depends greatly on your definition of "work."
You can charge the iPad via an iPhone adapter or an external battery designed for use with a phone however the iPad will charge much more slowly. Also, since the size of the iPad's battery exceeds the size of most external batteries they usually won't fully charge an iPad.
By the same token, you can charge the TF Prime via an iPhone adapter or similarly powered external battery. But it will be very slow, almost to the point of uselessness (~2-3% an hour, if you are lucky)
In both cases for most non-standard chargers you will need to have the device turned off for it to charge at all.
That's interesting a solar charger, how long does it take to reach capacity though?
You need 15v to charge normal speed.
Buddy Revell said:
The solar charger I posted has a button for 5V, 9V, 12V, or 16V settings. It will charge the Prime at 12V and 16V.
Click to expand...
Click to collapse
This is true, but frankly it looks way too shady for me to be attaching to my TFPrime. I prefer to wait for more commercial products, versus quick Chinese ones.
TalynOne said:
Here's a review of one that should work:
http://www.androidpolice.com/2012/0...c-of-portable-chargers-with-a-price-to-match/
Click to expand...
Click to collapse
For the price why not just by the dock and know that it works
Primalwolf said:
For the price why not just by the dock and know that it works
Click to expand...
Click to collapse
Good point.
For $125 you would probably be better off spending $25 more and getting the keyboard dock. It contains a ~6 hour extended battery plus a full keyboard, USB port & SD card slot. It also exactly matches the TF Prime, acts as a screen protector and tablet stand and doesn't add a lot of bulk so it will fit inside most cases/sleeves that can also hold the tablet alone.
almightywhacko said:
Good point.
For $125 you would probably be better off spending $25 more and getting the keyboard dock. It contains a ~6 hour extended battery plus a full keyboard, USB port & SD card slot. It also exactly matches the TF Prime, acts as a screen protector and tablet stand and doesn't add a lot of bulk so it will fit inside most cases/sleeves that can also hold the tablet alone.
Click to expand...
Click to collapse
The dock works great and I kill the battery in my dock by the end of the day but my tablet battery is still above 80% when i get home if I play games or surf all evening on it it is still not below 25% by the time I am ready to charge it while I sleep. If you kill both batteries in one day then you probably haven't done much of anything else but stare at your tablet.
I second the dock, sometimes I go a few days without charging because the dock so generously gives up it's own life first
I third the dock! Very useful but it can get a little heavy. I was hoping to get an external battery for under $50. Does mAH matter, I seem some big ones with 6600 maH wondering if that would work.
Related
Hi everybody,
Since the TP2 is using a whole lot more power than my old HTC Universal, I am looking for a decent Solar charging solution for on my bike.
TomTomnavigator + GPS use more than 500mA (I mean when I put in a car charger of this type hte phone says "insufficient current to blablabl")
I surfed the net, but decent info is hard to find about this specific problem. I mean I want to plug my phone in the solar charger and KNOW that it will give sufficient powersupply to charge the battery (or at least keep it at the same level)
Anybody an idea or maybe a link to a DECENT site (with CORRECT technical info)? Commercial sites with the best product ever, i have seen enough until you test it!
thanx to all!
Kjoere
I have one of these that I got on Amazon for 80 bucks and I love this thing! It also acts as a spare battery, and you can adjust the voltage. I brought it with me when I went camping. It's definitely worth it.
http://www.icetechusa.com/catalogue-solar-167464-spec.html
I've tried several of the cheap Chinese solar chargers and also a Solio, and they are all crap
Solar charger need direct sunlight. If cloudy, they can take a few days (daylight days not 24hr days!) to charge. So unless you live on the African Savanah where it will charge in 7 hours, then you will have a long wait.
I put my Solio on my window cill in January this year, and by the midle of February it got a full charge. I kid you not
You are probably much better off with a external power pack that uses 1 or 2 standard AA batteries or a minimum 2000mAh lithium battery
This solar 'card' from Swiss batteries looks interesting.
A 1mm thick bendable, weather-proof card of more efficient modern solar cell technology, with a claimed [up to] 40% greater efficiency than other cells. A portable battery option (as with the power monkey ) is also available.
And check out the solar bags on their site too!
PaulusUK said:
You are probably much better off with a external power pack that uses 1 or 2 standard AA batteries or a minimum 2000mAh lithium battery
Click to expand...
Click to collapse
Where might I get an external power pack with more than one AA battery? I can only find 1xAA packs, and I can't imagine a little old alkaline AA could produce NEARLY enough current at 5v to charge our beefy phones. Not for any amount of time, anyway, and not without heating up to what I would consider dangerous levels...
godefroi said:
Where might I get an external power pack with more than one AA battery? I can only find 1xAA packs, and I can't imagine a little old alkaline AA could produce NEARLY enough current at 5v to charge our beefy phones. Not for any amount of time, anyway, and not without heating up to what I would consider dangerous levels...
Click to expand...
Click to collapse
I'm afraid too that alcaline AA's won't do the job pretty well, although rechargeable NiMh could be worth a try
For outdoor-recharge, I'm using this general USB-charger featuring a rechargeable 2200 mAh 18650 LiOn battery:
http://www.dealextreme.com/details.dx/sku.18883
It has the advantage that you can change the 18650 easily, thus enabling you to take several ones with you for long voyages
MeCry
godefroi said:
Where might I get an external power pack with more than one AA battery? I can only find 1xAA packs, and I can't imagine a little old alkaline AA could produce NEARLY enough current at 5v to charge our beefy phones. Not for any amount of time, anyway, and not without heating up to what I would consider dangerous levels...
Click to expand...
Click to collapse
This is the best on I have found
Its a massive 3400mAh with a 5v 700ma output so will charge most phones and other gadgets no problem. It is just a bit smaller than the TP2 so is easy to carry around in a pocket
I got mine off ebay for less money - same unit but a different manufacturer. AFAIK, these are commonly rebranded, but look for the shape and the 3400 mah spec.
Most of the other Chinese ones from places like Dealextreme are lower capacity
I was really hoping for something using standard AA (maybe NiMH, 4 of those would be 4.8V).
In fact, 2xAA NiMH should be able to deliver the sort of current we're talking about here, right?
And, sure enough, Here is someone that's built exactly what I want. Who wants to assemble me one?
One product springs to mind: The powermonkey-eXplorer
https://powertraveller.com/iwantsome/primatepower/powermonkey-explorer/
thanx roger
I got an Energizer 2xAA charger, and it works on my TP2 absolutely fine. You need to use good quality batteries in it, but it's fairly compact and keeps the battery topped up while I'm out using the GPS with no car nearby!!!
http://www.google.co.uk/products?hl...a=X&oi=product_result_group&ct=title&resnum=4
gringolian said:
I got an Energizer 2xAA charger, and it works on my TP2 absolutely fine. You need to use good quality batteries in it, but it's fairly compact and keeps the battery topped up while I'm out using the GPS with no car nearby!!!
Click to expand...
Click to collapse
Energizer says it needs Lithium batteries (which I think are 1.7v), have you tried with NiMH perhaps (which are 1.2v)? I'd think it'd figure the batteries were empty even when they were newly charged.
godefroi said:
Energizer says it needs Lithium batteries (which I think are 1.7v), have you tried with NiMH perhaps (which are 1.2v)? I'd think it'd figure the batteries were empty even when they were newly charged.
Click to expand...
Click to collapse
I've got standard Duracell 1.5V alkaline batteries in it right now, and it charges it just fine! I think energizer say that to make you buy their ridiculously expensive lithium batteries!!
Hi,
I plan to disappear into the woods and come back out when I've finished my thesis (more or less). So I'm interested in buying a solar panel to use with my transformer and since people here seem pretty knowledgeable about charging the transformer I thought I would run it by you guys to make sure I do not miss something important.
I've gathered so far that I will need at least an 11v panel.
Also, it seems I need USB 3.0 to charge by USB. Is this correct?
And if I can't get USB 3.0 I will have to modify a 2.0 wire or plug or whatever... I prefer to avoid this
What should I go for in terms og Watts?
Would it be reccommendable to buy a panel with a battery to get a more even current?
Recommandations would be great!
Wow, I thought I was the only one that even remotely cared about this!
I have a Goal0 Nomad 7m. It's 12v, and I have had no luck getting it to charge my TF. Do you think it might be because of the USB 3.0 requirement?
Great that I'm not alone! Too bad that it doesn't work though...
I got the thing about USB 3.0 from this thread;
http://forum.xda-developers.com/showthread.php?t=1087321
reading it again I noticed this line;
"The Asus charger does need a 3.0 cable extension to work. But with a DIY charger you don't need USB 3.0 cables or connectors."​
So I'm not really sure if it makes a difference whether you use USB 2.0 or 3.0.
Anyway the specs for your Nomad says that it's 5v for USB output and 12v for DC output so I'm guessing that's why it doesn't work with the transformer.
Miki T. said:
Great that I'm not alone! Too bad that it doesn't work though...
I got the thing about USB 3.0 from this thread;
http://forum.xda-developers.com/showthread.php?t=1087321
reading it again I noticed this line;
"The Asus charger does need a 3.0 cable extension to work. But with a DIY charger you don't need USB 3.0 cables or connectors."​
So I'm not really sure if it makes a difference whether you use USB 2.0 or 3.0.
Anyway the specs for your Nomad says that it's 5v for USB output and 12v for DC output so I'm guessing that's why it doesn't work with the transformer.
Click to expand...
Click to collapse
You're right!...that actually means there's options. Shouldn't something like this work?
http://www.amazon.com/Portable-Inve...=UTF8&coliid=IUJZFD56YRM5K&colid=HQA2VAAM7MXY
I think I'm gonna have to order this, and give it a shot. I already have the panel & the DC jack, so I might as well.
Hey nice find! It seems like it should work, though don't take my word for it. I'm really ignorant of this stuff which is why I started the thread to begin with In any case $22 for a charger sounds fairly cheap.
Let me know if it works or not!
Solar panels that put out more than 28W (5V, 2A = 10W + 15V, 1.2A = 18W) would be enough, but then you'd likely want to run it through an inverter to get 110v AC, then the ASUS charger.
Until and unless ASUS comes out with a car charger that would work with the dock, running an inverter to generate an AC signal, then running it through the AC adapter will be the way to go.
Figuring in efficiency losses, you'll probably want 50-75W worth of solar panels for this to work. You can also use a 12v battery as a ballast.
FrayAdjacent said:
Solar panels that put out more than 28W (5V, 2A = 10W + 15V, 1.2A = 18W) would be enough, but then you'd likely want to run it through an inverter to get 110v AC, then the ASUS charger.
Until and unless ASUS comes out with a car charger that would work with the dock, running an inverter to generate an AC signal, then running it through the AC adapter will be the way to go.
Figuring in efficiency losses, you'll probably want 50-75W worth of solar panels for this to work. You can also use a 12v battery as a ballast.
Click to expand...
Click to collapse
You don't need 5V and 12V, only 12V. The Asus charger only puts out 5V for non-transformer devices. Don't introduce all the loss from the 110V converter, just charge a 12V battery with a panel(the Asus will draw 18 watts at full charge), then charge the transformer from the battery. Just get a usb extender, cut it, and hook negative to pin 4 and positive to pin 1. I would recommend a 5 Ohm resistor to limit amperage, but it isn't necessary.
I'd like to hear how it works out.
I was considering putting some flexible solar panels on the back of the transformer. But with the dock, I've got more than enough power for my needs. Plus, the back of the transformer won't get that much sunlight.
I'm now moving on to trying to put solar panels on the back of my cellphone (Huawei U8800). It's a great phone, and the battery lasts all day, so long as I don't play too many games.
One thing you might want to consider is an external battery pack. They are pretty cheap here in China, and have huge batteries in them. They even have some with built in solar panels. I'm sure you could find one that could recharge the Transformer. Then you could have the battery pack in the sun charging via the solar panel, and you sitting in the shade with the transformer. At night plug the battery up to the transformer to let it charge while you sleep. The transformer with dock should have more than enough battery life to last all day.
If I come across any useful information during my research, I'll let you know.
Miki T. said:
Hey nice find! It seems like it should work, though don't take my word for it. I'm really ignorant of this stuff which is why I started the thread to begin with In any case $22 for a charger sounds fairly cheap.
Let me know if it works or not!
Click to expand...
Click to collapse
I bought it! ...and it will be here this afternoon. Thanks to Amazon Prime local delivery .
I'll let you know how/if it works out.
philburkhardt said:
I bought it! ...and it will be here this afternoon. Thanks to Amazon Prime local delivery .
I'll let you know how/if it works out.
Click to expand...
Click to collapse
Stuff like that is great for the car, but you're gonna lose SO much efficiency through it, then even more loss from the Asus charger plugged into it. A 15W solar panel should be enough to charge the TF directly. Using an inverter with the asus charger, you'll probably need 50-100W. Just FYI.
msticninja said:
Stuff like that is great for the car, but you're gonna lose SO much efficiency through it, then even more loss from the Asus charger plugged into it. A 15W solar panel should be enough to charge the TF directly. Using an inverter with the asus charger, you'll probably need 50-100W. Just FYI.
Click to expand...
Click to collapse
Yup, you're right. No go on charging the TF. Like you said, it will be great for charging things in the car. Just not off my 12W solar panel. I think I'm gonna have to upgrade my panel .
philburkhardt said:
Yup, you're right. No go on charging the TF. Like you said, it will be great for charging things in the car. Just not off my 12W solar panel. I think I'm gonna have to upgrade my panel .
Click to expand...
Click to collapse
The real joy of the TF is that it charges directly from 12 volts, so, assuming you have a 12 volt 12W panel, you should go get a 12 volt battery, 4AH(amp-hour) at least. It will be about the size of an old 6 volt lantern battery. Hook the panel to the battery to charge the battery, hook a female usb port to the battery, and hook the TF directly to the female usb port. You'll probably be able to get through a whole night on a 4AH battery + the TFs battery.
Great! Lots of useful replies... thanks a lot!
I plan on not using the adapter and use a USB extender the way msticninja wrote, since I don't want to carry or pay for something that delivers 50-100W.
I think I've found the panel I am going to buy. I cannot include outside links until I've posted 8 messages, but you can easily find it by googling "Portable 9x 2.5 W Solar Panel". So 22.5 Watt... that should suffice. That's at 18v * 1.25a.
It seems that all the solutions that comes with a battery are all quite pricey, but then I don't really need some fancy battery do I? Some do-it-yourself solution should be fine as long as the battery is rechargeable, 4AH("at least") and 12v right?
Do I want to reduce the voltage of the solar panel to 12 instead of 18? And should I worry about overcharging the battery?
By the way, is the battery an absolute necessity or is that only if I want to charge during the evening/night?
What I hope to be able to do is; be away from mains for about one week at a time, and use my laptop, say, 8 hours a day. I hope this will be enough...
Miki T. said:
That's at 18v * 1.25a.
Do I want to reduce the voltage of the solar panel to 12 instead of 18? And should I worry about overcharging the battery?
Click to expand...
Click to collapse
The Asus charger will put out 15V at most, as marked on the charger itself. I don't think I'd use anything higher than 12V into the tablet/dock. You'd probably want to use some kind of voltage regulator to drop the 18V to 12V.
Without knowing the internal workings of the dock/tablet, I can't really comment more than that.
Miki T. said:
Great! Lots of useful replies... thanks a lot!
I plan on not using the adapter and use a USB extender the way msticninja wrote, since I don't want to carry or pay for something that delivers 50-100W.
I think I've found the panel I am going to buy. I cannot include outside links until I've posted 8 messages, but you can easily find it by googling "Portable 9x 2.5 W Solar Panel". So 22.5 Watt... that should suffice. That's at 18v * 1.25a.
It seems that all the solutions that comes with a battery are all quite pricey, but then I don't really need some fancy battery do I? Some do-it-yourself solution should be fine as long as the battery is rechargeable, 4AH("at least") and 12v right?
Do I want to reduce the voltage of the solar panel to 12 instead of 18? And should I worry about overcharging the battery?
By the way, is the battery an absolute necessity or is that only if I want to charge during the evening/night?
What I hope to be able to do is; be away from mains for about one week at a time, and use my laptop, say, 8 hours a day. I hope this will be enough...
Click to expand...
Click to collapse
You will need some sort of voltage regulation to maintain 12V. That's pretty much a requirement for any solar charging system. Panels themselves do not usually have regulation, so the output voltage of the panel is a function of the amount of light the panel is receiving.
This is a really quick search, but this satisfies all the requirements for what you need, and it's only $20:
http://www.amazon.com/Ramsond-SunShield-Charge-Controller-Regulator/dp/B0031FQ1S6
Feel free to search for alternatives, but use that as your starting point for searching.
Another quick search to give you an idea what you're looking for as far as batteries:
http://www.google.com/products/catalog?q=12v+4ah+battery&oe=utf-8&rls=org.mozilla:en-USfficial&client=firefox-a&um=1&ie=UTF-8&tbm=shop&cid=15393345737619657558&sa=X&ei=lq5MTsCGGMSCsgLgivmCBw&ved=0CHIQ8wIwAA
If I made something for myself, I'd use Lithium Ion cells and use a smart lipo charger to regulate the solar panel output, but it needs more research, and will cost more.
This will be interesting!
I've ordered the parts - the panel I mentioned, the Ramsond SunShield 12V 8A Solar Charge Controller Regulator that msticninja suggested and a Super Rechargeable Li-ion Battery, 12V 6800mAh. I ordered the panel and the battery off of sunsky. They seem to have very fair prices.
All the parts came to a total of $164, shipping included. Compared to complete sets with the same specs I'd say that's a really good deal, provided I make it work
I'll let you know!
Miki T. said:
This will be interesting!
I've ordered the parts - the panel I mentioned, the Ramsond SunShield 12V 8A Solar Charge Controller Regulator that msticninja suggested and a Super Rechargeable Li-ion Battery, 12V 6800mAh. I ordered the panel and the battery off of sunsky. They seem to have very fair prices.
All the parts came to a total of $164, shipping included. Compared to complete sets with the same specs I'd say that's a really good deal, provided I make it work
I'll let you know!
Click to expand...
Click to collapse
Give me a link to that Li-ion battery. If it doesn't have it's own charging circuit, you'll need to get a lipo charger instead of/in addition to the Ramsond regulator. I'll check it out for you.
EDIT: If it's this one: http://www.ebay.com/itm/DC-12V-6800mAh-Super-Rechargeable-Lithium-ion-Battery-/150530536976
it's hard to say, but I think it has it's own charging circuit, because the wall wart included with it doesn't look like a lithium charger. But it does have a charge finished light, so, if the light stays on when the battery isn't plugged in, you should be okay. If the green light only turns on when a fully charged battery is connected, then you might not be fine. Confirm what you're getting by posting a link, and I'll try to make sure. If it doesn't have it's own charging circuit, the battery will explode in a fireball.
EDIT2: This one has it's own charging circuit, and it sounds like it's what's inside the other one I linked, so you should be okay if it's either of these.
http://www.lunershop.com/product_info.php?language=en¤cy=USD&products_id=2566
Just wondering if something like this would help.
http://www.ioffer.com/i/solar-battery-panel-usb-charger-for-cell-phone-mp3-mp4-147450373?source=eisi
I have no understanding of electricity, except the basic 4th grade stuff. This is a cool project thought. I'm planning on making a 55 paracord strap that will attach to my case and fit like a messenger bag. Having solar panels to charge it and a paracord strap would make the TF a nice camping device
SwiftLegend said:
Just wondering if something like this would help.
http://www.ioffer.com/i/solar-battery-panel-usb-charger-for-cell-phone-mp3-mp4-147450373?source=eisi
I have no understanding of electricity, except the basic 4th grade stuff. This is a cool project thought. I'm planning on making a 55 paracord strap that will attach to my case and fit like a messenger bag. Having solar panels to charge it and a paracord strap would make the TF a nice camping device
Click to expand...
Click to collapse
Nope, as discussed before, the TF uses 11-15V to charge, and normal USB chargers/backup batteries only put out 5V.
msticninja said:
Give me a link to that Li-ion battery. If it doesn't have it's own charging circuit, you'll need to get a lipo charger instead of/in addition to the Ramsond regulator. I'll check it out for you.
EDIT: If it's this one: http://www.ebay.com/itm/DC-12V-6800mAh-Super-Rechargeable-Lithium-ion-Battery-/150530536976
it's hard to say, but I think it has it's own charging circuit, because the wall wart included with it doesn't look like a lithium charger. But it does have a charge finished light, so, if the light stays on when the battery isn't plugged in, you should be okay. If the green light only turns on when a fully charged battery is connected, then you might not be fine. Confirm what you're getting by posting a link, and I'll try to make sure. If it doesn't have it's own charging circuit, the battery will explode in a fireball.
EDIT2: This one has it's own charging circuit, and it sounds like it's what's inside the other one I linked, so you should be okay if it's either of these.
http://www.lunershop.com/product_info.php?language=en¤cy=USD&products_id=2566
Click to expand...
Click to collapse
Fireballs are serious business...
The one I ordered is the blue one. I can't really confirm with a link since I cannot post external links until 8 posts but there shouldn't be any mistake. And it does say the following about it;
With its multi-protective device, the inner circuit pervents the box from over-recharging or over-discharging.​so it should be safe I think...
Has anyone found a portable Battery pack that we can use on the TF? I have several that I have used for my iPhone and my old iPad2 but all are only 5v. is there one out there that can charge out TF or is the keyboard dock the only way to go for extra Battery?
There are several battery packs used for notebook computers that will work listed on Amazon. Just be sure they have a 12Volt output. EverReady had as battery pack that will also work but you will need an adapter provided by them. The key is that you need an output of 12 to 15 volts to charge the TF or Keyboard. You might read Devcake's post on a DIY charger for the TF as information on the voltages required to charge the TF. There is also a post on external batteries that might help.
hshoem1
By chance do you have a link to the EverReady battery pack? I would like to see it
hshoem1 said:
There are several battery packs used for notebook computers that will work listed on Amazon. Just be sure they have a 12Volt output. EverReady had as battery pack that will also work but you will need an adapter provided by them. The key is that you need an output of 12 to 15 volts to charge the TF or Keyboard. You might read Devcake's post on a DIY charger for the TF as information on the voltages required to charge the TF. There is also a post on external batteries that might help.
hshoem1
Click to expand...
Click to collapse
I have an XP8000 from Energizer, and work perfectly.
w w w.energizerpowerpacks.com/us/products/xp8000/
You will need a conector for Asus (Willy cable WI15) from them. You will have two free tips a year for the life of product
By any chance do you know the tip number?
The cable you note doesn't appear to connect directly to the Transformer.
What setup are you using to connect to the Transformer?
Thanks
steve
The cable it's a Female USB with 16V output. You need the Asus cable.
xp8000
I looked in the web site and it is expensiver than Asus keyboard!
alberteske said:
I looked in the web site and it is expensiver than Asus keyboard!
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Click to collapse
May as well get the keyboard then xD. Thats the whole point of it being a transformer anyways
RojoNinja said:
May as well get the keyboard then xD. Thats the whole point of it being a transformer anyways
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Or get both, even better
I just saw this while I'm looking for a battery pack.
On a german page I found this interesting:
w w w.intecro.de/XTPower-MP-16000-Powerbank-mobiler-Akku-mit-16000mAh-fuer-Laptop-Handy-iPhone-iPod-iPad-PDA-MP3-Player-mit-20-Adaptern
(can'f find an english page for this product)
Could I use this one by using an adapter?
I just got an Anker Astro3 10000mAh battery pack. I plan to use it while camping this summer, mainly to charge a phone, but occasionally to charge my tablet.
It is intended to charge 5V USB devices, and has two USB ports. It also has a 12 volt port. The adapters for the 12 volt port, of course, do not work with USB or the Transformer. So I made an adapter, and I am good to go now for charging the tablet.
The battery pack charges from a 12 volt wall charger. I have also made an adapter to charge it from the 12 volts on my motorcycle. So I will be charging it from the motorcycle during the day when riding, then using it to charge my devices in the evening at the camp. I've already tried it a couple of times, and it worked well.
I tried to charge the battery pack using a solar panel, but the solar panel was far too wimpy. It was like trying to run a house air conditioner from a penlight battery. It may make you feel good to try it, but it isn't going to do much.
So far so good. This is very close to what I need.
The issues I have had to work around are:
1) I want to also charge an in helmet bluetooth intercom from the USB port. But the charge current is so low, the battery pack auto powers off, thinking nothing is plugged in. Not a big deal because I can plug in my phone at the same time. That keeps it turned on until everything is charged, then it auto shuts down.
2) When I charge the Asus Tablet, it doesn't appear to auto shut down. Just the opposite of #1, it looks like the load stays high enough to never shut down when charging the tablet. This may not really be true, as I have only tried it a couple of times. Also, it isn't good for much more then one and a half charges of the tablet, as expected.
3) You need to figure out your own harness to get the 12 volts to the tablet.
4) No charge cable for a car. I mean this is rated for an input of like 10 to 15 volts, or some such. This thing is GREAT for charging portable devices. Charging it from a car is as simple as a cable, but there isn't one.
Over all this charger is a winner. At right around $55 US, I recommend it, if you can fabricate a plug for charging the Transformer.
Try a 12V UPS type battery along with a 2A fuse and adapters. It only costs about $20 or so. Plan on using only 50% of its capacity and recharge often to get the most life out of it.
Someone posted this product on another post
http://www.sobuying.com/products/Solar-Charger-For-Notebook,-Ipad,-tablet-pc,-Cell-phone,-MP3,-Laptop-11200mAh.html
May suit your needs
NiHaoMike said:
Try a 12V UPS type battery along with a 2A fuse and adapters. It only costs about $20 or so. Plan on using only 50% of its capacity and recharge often to get the most life out of it.
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For me, this is actually what I use now. But it has issues.
One is simply that it is large. I carry it in the trailer that I tow behind the motorcycle, so it is OK, but a bit too large and heavy. It is a gel cell that has about a 48 WattHr capacity. LiIon has a a lot less and weight. In this case, it has about the same capacity, in a very small light weight package.
The other problem is charging the lead acid battery is an issue. I need to carry a AC charger and find AC when camping. I put a diode/resistor combo in the trailer and tapped off of the taillights. but by the time the weak motorcycle voltage gets to the taillights, add in the diode and other losses, and I'm lucky to see 13 volts at the battery. Not enough to charge it very well. The LiIon pack I use has the supply built in to charge properly from +12.
So I've tossed the lead brick battery (literally) and upgraded to a portable LiIon pack. So far so good.
This is what I use "Portable 12V DC USB 5V Rechargeable Lithium Li-ion Battery Pack for CCTV Camera" search on ebay, you can get one up to 13AH
I got a 3.8AH version for $16 , Dimension: 9.2cm X 6.0cm X 3.0cm
Outout rated 5V (5.8AH) and 12.8V (3.8AH)
small modification because the charger is NON-US wall plug, I just pull the plug pin out and add in a regular power cord cut off from an old appliance
Keep the USB plug for 5V use, cut the 12V DC cable and connect it to a female USB cable (pin 1 and pin 4) , then you can plug in the Asus usb/charge cable directly and charge or power the Asus
...
********
UPDATE 1/10/2012
This below charger and USB adapter WORKS LIKE A CHARM!!!
Charged fast... from 20percent to 100 percent in 2 hours!!!!!
I can now STOP using the OEM charger which is crap!
Admin: Please add this to the list of working prime accessoriesMy first transformer Prime had charging issues, ( would not charge intermittently) and I found the OEM charger that ships with the prime to be sub-par.. So:
After checking out NUMEROUS threads, I just purchased the following charger and USB adapter from Radio Shack to Use with my Prime:
This particular model has been confirmed to work on the original Transformer-
Enercell AC to DC power adapter 12vdc 1.5A
Radio Shack Model # 273-358
http://www.radioshack.com/product/index.jsp?productId=3807944
used together with this USB adapter:
Model #273-227
http://www.radioshack.com/product/index.jsp?productId=3643549
Does anyone know if the above Enercell 12V 1.5A charger should work on the Prime?
see post #104 here in this thread:
http://forum.xda-developers.com/showthread.php?t=1087321&page=11
Also, can someone confirm the Tip polarity I should use? (I believe the prime uses Positive tip polarity just like the original transformer did?)
http://www.12volt-travel.com/knowledgebase/universal-adapter-tip-polarity/
Thanks for any feedback!
********
UPDATE 1/10/2012
This above charger and USB adapter WORKS LIKE A CHARM!!!
Charged fast... from 20percent to 100 percent in 2 hours!!!!!
I can now STOP using the OEM charger which is crap!
Admin: Please add this to the list of working prime accessories
********
UPDATE 1/10/2012
This above charger and USB adapter WORKS LIKE A CHARM!!!
Charged fast... from 20percent to 100 percent in 2 hours!!!!!
I can now STOP using the OEM charger which is crap!
The charger doesn't even get barely warm while it charges... much better than OEM for me!
Admin: Please add this to the list of working prime accessories
I thought I read somewhere that fast charges aren't good for the long term viability of lithium-based batteries.
---------- Post added at 07:27 PM ---------- Previous post was at 07:25 PM ----------
http://batteryuniversity.com/learn/article/how_to_increase_the_runtime_of_your_wireless_device
Simple Guidelines to Prolong Lithium-ion Batteries
Do not discharge Li-ion too low; charge more often.
A random or partial charge is fine. Li-ion does not need a full charge.
Limit the time the battery resides at 4.20/cell (full charge), especially if warm.
Moderate the charge current to between 0.5C and 0.8C for cobalt-based lithium-ion. Avoid ultra-fast charging and discharging.
If the charger allows, lower the charge voltage limit to prolong battery life.
Keep the battery cool. Move it away from heat-generating environments. Avoid hot cars and windowsills.
High heat and full state-of-charge, not cycling, cause short battery life in laptops.
Remove battery from laptop when used on the power grid.
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Yeah, I would avoid third-party chargers. Have had a lot of problems with them for laptops.
clankfu said:
Moderate the charge current to between 0.5C and 0.8C for cobalt-based lithium-ion. Avoid ultra-fast charging and discharging.
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Click to collapse
Taking 2 hours to charge implies a 0.5C charge rate.
What's the rated voltage, current and wattage of the stock charger anyway?
Please note that the above charger won't work overseas. It's only got 110V.
webbrowser said:
Taking 2 hours to charge implies a 0.5C charge rate.
What's the rated voltage, current and wattage of the stock charger anyway?
Click to expand...
Click to collapse
Stock charger is rated 15 volts DC @ 1.2 Amps
This radio Shack charger That is working for me is rated 12volts DC @ 1.5Amps.
I read the Transformer specs required to chagre are 11V to 15V DC @ 1A to 2A max
This charger fits within these specs, so that is why it works pretty well. The TP and the charger itself do not get hot at all, so I don't think this is causing any issues with the battery. Does anyone think a slightly quicker charge time will harm the battery long term?
Li-Ion Batteries are sensitive to fast charging. While it is within specs, your long term battery life could be affected. There is probably a reason that Asus decided to stay at the very bottom end of the spec.
nslayden said:
Li-Ion Batteries are sensitive to fast charging. While it is within specs, your long term battery life could be affected. There is probably a reason that Asus decided to stay at the very bottom end of the spec.
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I have done additional research due to above feed back in regard to Li-Ion's sensitivity with faster chargers.
Apparently, you are correct in regard to long term battery life concerns. I have only done 3 charges so far with the Radio Shack charger. I will let it drain down and switch over to the stock for now and just keep this other one as a backup. Is charging at 300MA more than OEM that much more of significant concern?
Better safe than sorry. Hopefully the few charges I have done did not cause any harm.... If the stock charger goes bad again though, I don't know if I would buy another one....
What was interesting is how hot the stock charger becomes in comparison to the radio shack model, which barely gets even warm. I always was a believer that more heat means less efficiency, so I'm somewhat confused, but I don't want to risk shortening the battery life, so I will go back to OEM stock charger for now, but reluctantly.
I wonder How these "alternative" chargers have effected the batteries for others with the original transformer?
That's an expensive charging setup... nearly $40 eek
mazjohn said:
I have done additional research due to above feed back in regard to Li-Ion's sensitivity with faster chargers.
Apparently, you are correct in regard to long term battery life concerns. I have only done 3 charges so far with the Radio Shack charger. I will let it drain down and switch over to the stock for now and just keep this other one as a backup. Is charging at 300MA more than OEM that much more of significant concern?
Better safe than sorry. Hopefully the few charges I have done did not cause any harm.... If the stock charger goes bad again though, I don't know if I would buy another one....
What was interesting is how hot the stock charger becomes in comparison to the radio shack model, which barely gets even warm. I always was a believer that more heat means less efficiency, so I'm somewhat confused, but I don't want to risk shortening the battery life, so I will go back to OEM stock charger for now, but reluctantly.
I wonder How these "alternative" chargers have effected the batteries for others with the original transformer?
Click to expand...
Click to collapse
I wouldn't worry if I were you. What you bought is just an adapter with a USB socket. The part which decides how to charge the battery is inside the tablet. The requirement for the adapter is to have the same voltage as the original one and at least as much current ( meaning 1.2A or more). The tablet will only take what it needs.
Be careful http://m.youtube.com/#/watch?desktop_uri=/watch?v=SMy2_qNO2Y0&v=SMy2_qNO2Y0&gl=US
susko said:
Be careful http://m.youtube.com/#/watch?desktop_uri=/watch?v=SMy2_qNO2Y0&v=SMy2_qNO2Y0&gl=US
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It's always easy to scare people. It does say in the description of the movie that he did it by removing the protection circuit. They are designed with protection, so of course they will blow up without one.
Dude why so serious?
It was a joke thus a smiley was implemented. It is quite difficult to do that to a battery. Although I have seen some insane people in the RC hobby community destroy expensive cars and helicopter this way.
Lipo+ignorance=Hollywood style explosions
I saw the smile, don't worry. It is just that most of people, especially when they do not have the knowledge about something, tend to see the bad part (I'm also guilty of this, not in this domain though ).
So, it was not anything against you, the video is entertaining. I just wanted to put people at ease.
Charging Issues
It does not matter the type of rechargeable battery, any "quick charge" will reduce the battery life. I personally don't think 300mA is that much of a difference, but am sure the battery life would be reduced somewhat over time. Nor would I worry much from just 3 charges.
However I don't think we should have to shell out an additional $40 just because Asus can't build quality components. Mine quit charging consistently yesterday (week and a half). I guess we can put it in the same category as GPS...non professional and spotty at best.
EatMy45 said:
However I don't think we should have to shell out an additional $40 just because Asus can't build quality components. Mine quit charging consistently yesterday (week and a half). I guess we can put it in the same category as GPS...non professional and spotty at best.
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Click to collapse
Don't worry, ASUS will remove the charger from the SPECs and say it is no longer supported, problem solved...
I'm looking for an external battery charger (preferably solar powered) for taking my Note on backpacking trips. Unfortunately, most of the solar packs that I've found have only .5 - .7 amps available for USB output. If I'm using a 1amp charging cable (with the data leads shorted), will .7 amps kick in the AC charging speed? Is .5 amps enough to charge the phone while I sleep for 7 hours?
I suppose it depends on how long you are out without power but another alternative is an external battery that allows you to charge your phone by plugging it into the external battery.
This one here (at $75 USD) will let you charge the Note from completely dead to a full complete charge 4.4 times.
http://www.amazon.com/New-Trent-IMP...Z64Q/ref=sr_1_2?ie=UTF8&qid=1336084828&sr=8-2
So, if you started your backpacking with a full charge on both the phone and the battery pack, and assuming you charge the phone every night at say 20% battery left, you should get 6 days. If you need more than that, you can just buy a second battery pack (personally, Id want to have two just in case).
That's a good suggestion from littlewierdo. I would also have at least 2 spare batteries for the note. I don't think that .5 amps is enough.
Budge said:
I'm looking for an external battery charger (preferably solar powered) for taking my Note on backpacking trips. Unfortunately, most of the solar packs that I've found have only .5 - .7 amps available for USB output. If I'm using a 1amp charging cable (with the data leads shorted), will .7 amps kick in the AC charging speed? Is .5 amps enough to charge the phone while I sleep for 7 hours?
Click to expand...
Click to collapse
Budge I had an HTC evo 4g and got a 5400mah battery. This worked ok. However the output is .5a which will not charge the note if you are using maps with gps or bluetooth or playing tunes. It wil charge when not using those. Say at night when you are asleep. I think you would have to find a battery with output better than 1a to actually charge when you are actively using your phone. I am not sure of the actual output you would need. I will research it though for my own needs. I do use my note on my motorcyle with a charger which outputs .5a and this is nowhere near what is needed to use google maps and bluetooth and play tunes.
I am actively looking for a solution which will charge my note while using google maps, bluetooth, and playing tunes etc. I may have found a solution with a usb y cable which is connected a 2a source and a .5a source on my motorcycle.
The only solution for backpacking may be to charge when not using the note. I am fairly sure it will charge at .5a when sleeping.
Good luck.
kimtyson said:
That's a good suggestion from littlewierdo. I would also have at least 2 spare batteries for the note. I don't think that .5 amps is enough.
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imesg said:
I am actively looking for a solution which will charge my note while using google maps, bluetooth, and playing tunes etc. I may have found a solution with a usb y cable which is connected a 2a source and a .5a source on my motorcycle.
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Click to collapse
Im not sure where you got the .5 amps from, it outputs 1 amp, so it will charge the Note with the screen on. However, it wont charge quite as fast as the wall charger will it will actually charge the phone.
It should be able to handle keeping the screen on, bluetooth doesnt use much power at all so playing music shouldnt be an issue and gps uses very little battery as well. I dont see an issue with it.
Admittedly, I dont have one of these, dont really have much of a use for one at the moment but I cant possibly see any issues with this.
HOWEVER, there are alternative external battery packs that are MUCH cheaper with less mah capacity (meaning, in simple speak, you would get less power storage meaning that you wouldnt be able to charge your phone as many times as you might like). There are other USB battery packs that might also have less power output (or more) which might mean that you wouldnt be able to keep the screen on AND charge the phone.
Truth be told, I only looked for the highest capacity battery pack given what your situation was AND I tend to buy higher end if the price makes sense. In the case of battery packs similar to this design (external usb battery packs), they generally start at $30 and go to about $80 so buying the best possible makes sense. However, if the highest/best possible was $200, Id probably get something cheaper, but since its only ~$80, if I were in your shoes, that would be my choice.
Id probably consider getting two of them (that is, if we are talking about longer than 1 week excursions, if under a week, just get 1) and a decently long usb cable (3-4 ft) but not too long (you dont want to be tripping over the cable but you need it long enough that if you need to, you can charge the phone mid-day while hiking).
You dont need multiple batteries for the Note, the whole point of this external battery pack is to eliminate the need for them.
littlewierdo said:
Im not sure where you got the .5 amps from, it outputs 1 amp, so it will charge the Note with the screen on. However, it wont charge quite as fast as the wall charger will it will actually charge the phone.
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Click to collapse
littlewierdo I was not necessarily speaking of the device you suggested but one I had. I was warning Budge to be careful and not get a device which outputs only .5a. I was suggesting that he find one which will put out 2a if such exists. The device which you suggested will put out 1a. However I don't believe this would be enough for my purposes and maybe no Budge's either. i was not refering to your device or you. Not my intent to get in an argument with you but to help Budge find a suitable solution.
link to imp1000 manual:
http://www.google.com/url?sa=t&rct=...sg=AFQjCNFPt8XfUpeSr8olPnKLYCivrRvqFg&cad=rja
Couldn't make the link post as a link. Do a search for 'imp1000 manual'.
Ciao
Littlewierdo- I didn't disagree with your suggestion to use another battery pack to charge the existing battery. In fact, I have one and use that option myself. I was adding that it may be a good idea to have a spare. I was responding to the OP who mentioned .5 amps. I assume that's where imesg was coming from, too.