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do there exist any battery chargers that are not cradles? I don't need a cradle. But I need to be able to charge my spare battery when I'm travelling. I'm not going to carry my cradle while flying around. But I don't see any battery chargers for sale, I mean ones like we use for our camera batteries. What's the deal?
also, are there any standards in batteries within HTC? or does each model use a different type of battery
Found this one
http://cgi.ebay.com/HTC-Touch-Cruis...ryZ15037QQssPageNameZWDVWQQrdZ1QQcmdZViewItem
Looks ok. $10 delivered, folds, world AC.
speakerphone said:
Found this one
http://cgi.ebay.com/HTC-Touch-Cruis...ryZ15037QQssPageNameZWDVWQQrdZ1QQcmdZViewItem
Looks ok. $10 delivered, folds, world AC.
Click to expand...
Click to collapse
thanks for the link... for $10 US Dollars, its worth trying out...
i received the charger and - so far - it appears to be working very well. one plus is that it has a USB cord that allows you to use your laptop or a cigarette lighter adapter to charge your battery. it also has the built-in prongs to plug into the wall. certainly a good investment (so far)...
What? I thot the USB cord was to use it as a USB charger for the actual PDA? Ur saying it can charge the battery from a laptop too? Sounds good. Now if only my TC would actually get delivered to me...
speakerphone said:
What? I thot the USB cord was to use it as a USB charger for the actual PDA? Ur saying it can charge the battery from a laptop too? Sounds good. Now if only my TC would actually get delivered to me...
Click to expand...
Click to collapse
yes, the charger came with a USB-to-USB cable so that i can use the charger from my laptop or any device that supports a USB connection.
I use this one...
http://www.boxwave.com/products/versachargerpro/index.htm
It has a car charger, wall socket charger, airplane charger all in one!
it has modules for american and european plug outlets as well
It's a little expensive but well worth it, cause it basically takes 3 different pieces and combines them into one
I'm waiting for that one to arrive as well, actually my TC is so delayed and we get it until next month...
But I thought the battery charger was also capable of being used as a charger.
anyway, as for the aeroplane charger I've never been on an airline that has a charging socket. Maybe you need to be in business class?
Yeah, only a select few airlines have the chargers in the seats...but either way it's good to have something like that when it's available...BTW, how much did you pay for the spare battery?
I also bought that Battery Adapter PRO thing from boxwave...it looks pretty cool, it uses AA batteries in a box to recharge your phone, and it says it can sustain 5 charge cycles from one set of batteries. Looks kinda cool. I hope to receive that, and the cradle I bought from them tomorrow.
Not enough power to charge direct to the phone.
cortezzi said:
thanks for the link... for $10 US Dollars, its worth trying out...
Click to expand...
Click to collapse
I have tried to use the USB charge direct to the TC, but It cannot provide enough power to charge direct the Phone:
USB Travels Charger:
Input: AC 110-240v 50/60Hz
Output: DC 4.2V 350mA (Charge the second battery)
Output: USB 5.0V 800mA** (I tried to use this to charge my TC)
HTC original wall charger:
Input: AC 100-240v 50/60Hz
Output: miniUSB 5V 1000mA**
However, If you only want to get power from notebook or car to charge the second batter, it's OK.
Actually 800mA is OK to top up, but only if your batt has say 15%+ left.
My battery is on order, HTC official one for 29 pounds.
I wonder about the ebay ones for US$5, but I've been burnt on a camera batt once, brand new off ebay, canon packaging $20 vs $40 in store, max charge was like 20%...
Tho now I think of it 30P is a lot...
ebay has become the cesspool of the internet
a place where scammers and theives / con artists unite and try to screw people over 24/7
i will never ever buy anything off ebay ever again :|
ESP not a battery...itll prolly work for like 2 months and then die..IF that lol
surgex0 said:
ebay has become the cesspool of the internet
a place where scammers and theives / con artists unite and try to screw people over 24/7
i will never ever buy anything off ebay ever again :|
ESP not a battery...itll prolly work for like 2 months and then die..IF that lol
Click to expand...
Click to collapse
Agreed...10 years ago ebay was an ok place to buy stuff. Now its truely buyer be ware. I never buy electronics from ebay, what a junk yard. Buy straight from the vendor, you get what you pay for...
Has anyone bought a solar charger for the G1? I'm going camping for 2 weeks soon and have been looking at the chargers but not sure about them. Anybody have good experiences with any of them? Satisfied with the performance and charge time? I've a 2600 mAh seidio battery.
Solar Powered Charger
Well, I was browsing around one of the numerous Chinese websites that sell random no-brand parts and accessories, and stumbled upon this:
http://www.davismicro.com/products/product_1950.htm
It is a solar powered charger, and based on the specs, it says it can charge a RAZR V3. If I am not mistaken, charging specifications on the RAZR are similar to that of the G1. Any ideas? I couldn't use this, living in Oregon I would probably have to put this on the roof surrounded by mirrors.
dont get it. i got one from best buy and it sucked. never chared my phone once.
BestBuy sells this kinda stuff??
Awesome this is whats needed
I wouldn't bothewr with something cheap like that.
A Friend in OZ got something very much like that and it was rubbish and just wouldn't charge anything so he got one like mine.
A freeloader: http://www.hookarama.com/items/1925_1216480SIL
There's probably better sellers than that and it's a bit more expensive than the cheap ones but you get what you pay for.
Tha advantage of this one is that it has a built in battery and removeable solar panels so once it's charged it's battery you can remove the panels and just take the little battery pack with you.
Charges the G1 just fine too!
Phil
http://www.google.com/products?q=Solar+mobile+charger&oe=utf-8&hl=en&scoring=p
Quite a few.
-bZj
Free Loader
I have a Free Loader Solar Charger, and this is my experience:
The device itself is a couple of centimetres longer than the G1 and the same width/depth and well designed, it comprises of a battery and two solar panels that click onto the battery. It come with 12 different adapters making it very versatile.
The two small solar panels that attach to the device are very small and it takes about 2 days of (admittedly dull) English sunshine for it to reach a full charge. this is pretty impractical.
I purchased a larger solar panel produced by the same company, it has a USB port, so if you know how you could put a usb port on any solar panel and use it to charge this battery via traditional USB to mini USB. On a sunny day this larger panel took only 3 hours to reach a full charge. Making the device very practical and usable.
However even a full charge of this battery achieved via charging from computer USB will only power the G1 up to 60% battery level.
This is purely anecdotal but I get the feeling that this charge then runs down quicker than when i charge direct from USB or mains. Is this just me or could there be an explanation for this?
I use it by charging via the computer and then taking it along as a second battery. In an emergency a few hours of sunshine even with dull light will give just enough for a phone call.
Just posted this on another forum. Just bought one and used coupon code THANKYOU for 10% off.
http://www.store.motorola.com/Batte...olor_map,price,size_name&searchRank=salesrank
Went on ebay and got 3 batteries and a wall charger for 12 bucks. Had the same for my Epic, they are from Hong Kong, and last about half as long as stock but for money spent, well worth it IMO.
Normally i stick to seidio for aftermarket batteries, but that offer is too good to ignore! thanks for the tip!
They take about 2 weeks to get to you, ground mail from China but used them for a year on my Epic. Great little backups, keep one in the car, one in the office, whereever.
I am still not sure which battery will fit the Photon. Let us know how it works out.
This one claims to be for the Photon and only the Photon, it only recently came out so it should work. It is not one of those that advertises for Atrix/Droid X2/Photon, which as we know the Photon does not share a battery with.
http://www.ebay.com/itm/NEW-3X-1500...119425?pt=PDA_Accessories&hash=item45fc81f7c1
Thanks for that ebay link! Wow 3 batteries and the external charger! I just purchased these and it is worth the gamble for $13. I think it will be okay. Worst case scenerio I also get the Seidio battery and I have this purchase to charge my OEM battery in the external charger
They have them for like every phone, usually 2 not 3, but the 3 is nice insurance for a DOA. Never heard bad about them other then they last about half as long as OEM.
What about those 1950 mAh batteries? Will they fit? They scare me because it does not say mB855 anywhere.
Just to confirm the 3 for 13 ebay batteries do fit and work in the Photon. Can't speak of life yet, i expect about half of stock prob a bit more but well worth it.
I posted this over in android forums but forgot to post it here as well.
I ordered this 3x 1500mAh battery + charger over in ebay.
The package does indeed come from China. The package has the 3 included batteries and the charger box.
Next we have images of the battery in its protective pouch and the battery charger.
Each battery is a 3.7VDC 1500mAh Rechargable Lithium-ion type of battery.
It states as a replacement for the BF5X/MB520/MB525 battery. But I can rest assure that it does fit the Photon.
The charger has retractable prongs to connect to the wall and it also has a usb port which I guess is to connect another device to charge from (like the Photon connected via a usb cable.) There is a nicely soft glow light that is colored red (more like magenta) when the battery needs charging and turns a nice color green when the battery is fully charged. Supposedly the charger box indicates that the charging stops once the battery is full to prevent overcharging, but I have no way of knowing that without a battery tester of some sort.
Here is the view of the light with a pic without flash on.
As I was testing this product, the supplied batteries get charged in about an hour each. Originally, I just inserted one of the batteries into the photon to see if it fit and worked and yes it does fit and charge the phone. But it quickly died since I didn't have it fully charged. Well after a few hours of charging all three batteries, I inserted one of them into the photon and see how long they last.
as for the USB port on the charger, well it does not provide any juice to the Photon via a usb cable. At first I thought it was my cable (previous HTC EVO cable) so I switched it to the official one from Motorola and nothing, zip nada.
At this point, I thought either I had a charging device that had a defective usb port or the port doesn't work at all. So I decided to do one last final test and plug in my Kensington Pocket Battery for Smartphones device (which I highly recommend by the way) into the usb port of the charger and tada, we have power. It charges the Kensington battery pack. But not the Photon via the usb.
Now going back to the battery in the photon, while not as long lasting as the official Motorola HF5X 3.8v 1650mAh battery, it does keep the Photon working long enough for me and until I am able to reach a charging port on long travels outside. And with 3 of them, I really do not have to worry. (So long as they all are charged fully). lol
Overall for the price, $12.90 I really can't complain. True the USB charge port only works for my Kensington but it does charge the 3 supplied batteries as well as the official Motorola one. Small, compact and good for travel.
oh and this image shows the pouch and where it came from as well as the model number of the batteries. As one can see it states it is a replacement for the BF5X Moto battery.
and finally here is another ebayer with a higher rated battery.
TS
We (Sprint) have OEM batteries available as well. They are currently not in any store, but we can direct ship them. They come with 1 OEM battery and the external charger for $49.99
http://shop2.sprint.com/NASApp/onlinestore/en/Action/OSBrowseAccessoriesDetail?categoryRefName=Chargers+%26+Batteries&PHONE_ID=MOTOMB855&selectedAccessoryID=BSM5687&topPageNumber=0&subPageNumber=0 Granted a bit more expensive, but they are still in production and once again, OEM.
notoriouspyro said:
We (Sprint) have OEM batteries available as well. They are currently not in any store, but we can direct ship them. They come with 1 OEM battery and the external charger for $49.99
http://shop2.sprint.com/NASApp/onli...oryID=BSM5687&topPageNumber=0&subPageNumber=0 Granted a bit more expensive, but they are still in production and once again, OEM.
Click to expand...
Click to collapse
How come it says 1700mah I thought ours was 1650
Sent from my MB855 using xda premium
here's a link for the current sale of the 1800mah one. I just bought one. Will update once I get it..
http://www.ebay.com/itm/2x-BF5X-180...ccessories&hash=item4aae919049#ht_3638wt_1396
twospirits said:
I posted this over in android forums but forgot to post it here as well.
I ordered this 3x 1500mAh battery + charger over in ebay.
The package does indeed come from China. The package has the 3 included batteries and the charger box.
Next we have images of the battery in its protective pouch and the battery charger.
Each battery is a 3.7VDC 1500mAh Rechargable Lithium-ion type of battery.
It states as a replacement for the BF5X/MB520/MB525 battery. But I can rest assure that it does fit the Photon.
The charger has retractable prongs to connect to the wall and it also has a usb port which I guess is to connect another device to charge from (like the Photon connected via a usb cable.) There is a nicely soft glow light that is colored red (more like magenta) when the battery needs charging and turns a nice color green when the battery is fully charged. Supposedly the charger box indicates that the charging stops once the battery is full to prevent overcharging, but I have no way of knowing that without a battery tester of some sort.
Here is the view of the light with a pic without flash on.
As I was testing this product, the supplied batteries get charged in about an hour each. Originally, I just inserted one of the batteries into the photon to see if it fit and worked and yes it does fit and charge the phone. But it quickly died since I didn't have it fully charged. Well after a few hours of charging all three batteries, I inserted one of them into the photon and see how long they last.
as for the USB port on the charger, well it does not provide any juice to the Photon via a usb cable. At first I thought it was my cable (previous HTC EVO cable) so I switched it to the official one from Motorola and nothing, zip nada.
At this point, I thought either I had a charging device that had a defective usb port or the port doesn't work at all. So I decided to do one last final test and plug in my Kensington Pocket Battery for Smartphones device (which I highly recommend by the way) into the usb port of the charger and tada, we have power. It charges the Kensington battery pack. But not the Photon via the usb.
Now going back to the battery in the photon, while not as long lasting as the official Motorola HF5X 3.8v 1650mAh battery, it does keep the Photon working long enough for me and until I am able to reach a charging port on long travels outside. And with 3 of them, I really do not have to worry. (So long as they all are charged fully). lol
Overall for the price, $12.90 I really can't complain. True the USB charge port only works for my Kensington but it does charge the 3 supplied batteries as well as the official Motorola one. Small, compact and good for travel.
oh and this image shows the pouch and where it came from as well as the model number of the batteries. As one can see it states it is a replacement for the BF5X Moto battery.
and finally here is another ebayer with a higher rated battery.
TS
Click to expand...
Click to collapse
Very sweet
Sent from my MB855 using xda premium
so glad I purchased this. Just got mine and its awesome for 13
mobilebuddha said:
here's a link for the current sale of the 1800mah one. I just bought one. Will update once I get it..
http://www.ebay.com/itm/2x-BF5X-180...ccessories&hash=item4aae919049#ht_3638wt_1396
Click to expand...
Click to collapse
I am very interested to know if this works out since the offer seems to be for another phone.
Thanks.
I noticed there's a US seller with a 1950mAh package... any thoughts on this one?
http://www.ebay.com/itm/3x-1950mAh-BF6X-Battery-Charger-Motorola-Photon-4G-/160653180016?pt=PDA_Accessories&hash=item2567acfc70
stormygal said:
I noticed there's a US seller with a 1950mAh package... any thoughts on this one?
http://www.ebay.com/itm/3x-1950mAh-BF6X-Battery-Charger-Motorola-Photon-4G-/160653180016?pt=PDA_Accessories&hash=item2567acfc70
Click to expand...
Click to collapse
DO NOT BUY THIS! I did and they are steamy Chinese turds. One hour battery life and the charger does not work. I bought Chinese batteries for my EVO that were very adequate. These suck.
Sidewinder7 said:
This one claims to be for the Photon and only the Photon, it only recently came out so it should work. It is not one of those that advertises for Atrix/Droid X2/Photon, which as we know the Photon does not share a battery with.
Click to expand...
Click to collapse
Thanks for the heads up, big fan of back ups
they're only $12 now re listed
Has anyone noticed that phone does not charge while using GPS. The charging indicator is on but when I look at the stats it says discharging at -450 mAh. Is this the way it is and if so, is there a fix? 1 hr 42 m with 73% display on battery use and 43% charge remaining, but was plugged in the entire time while driving under an hour home. I am using the same Motorola high performance charger that every other phone is charged fully even when using GPS.
are you absolutely sure the charger is giving the full 1A?
What sensor app are you using to see the battery discharging?
Mine charges normally with gps on.
Sent from my HTC
LTE 4G Rezound
I was curious so I tested this with "Battery Monitor" I have it plugged into my laptop currently which only gives +500mA. and not the +1A that you get from a wall/car/high power usb port.
the app is showing +257mA with GPS on and functioning normally.
So charging good here... Might be something with your motorola charger? It could have a sensor in it to detect 'trickle charging mode' that is improperly engaging when connected to the HTC causing the charger to put out a minimal 'sustain only' level of amperage.
good luck!
you need a charger putting out 1A ... most car chargers put out 500mA so find a good one off monoprice
Here's what I'm doing. I have a Belkin 2.1A(2100mAh) USB car charger dongle. The problem is, once i connect the USB cable to it the phone registers it as "Charging USB" and does notcharge anywhere near as fast(power-wise) as if the phone was registering it "Charging AC". I'm not keen on using a power inverter to get the full AC charge so instead i am going to go pick up a cheap micro USB cable, splice it open, then disconnect the data wires(green & white ones) & then tape it back up. By disconnecting the data wires, the phone will no longer think it's a USB connection and then charge via AC, getting the best charge possible.
that should work ^ if thats the problem
I've found that using the included USB cable with a Belkin dual port USB car charger allows the phone to charge as if it were plugged in to a wall. I'm guessing the included cable has a different layout than standard Micro USB cables.
Sent from my ADR6425LVW using xda premium
dawynkoop said:
I've found that using the included USB cable with a Belkin dual port USB car charger allows the phone to charge as if it were plugged in to a wall. I'm guessing the included cable has a different layout than standard Micro USB cables.
Sent from my ADR6425LVW using xda premium
Click to expand...
Click to collapse
I'm guessing that I have the same belkin dual port (2.1amp and 1amp ports) and the best I've seen out of it is about 250mah charging. This is using the supplied usb/micro hdmi whatever cord for the phone.
I have seen discharge rates off the charger of 750mah which is the highest I've seen on any phone. I'm guessing if you are using the nav on your phone with the screen on, it will probably still be using battery while plugged in.
thatsricci said:
I was curious so I tested this with "Battery Monitor" I have it plugged into my laptop currently which only gives +500mA. and not the +1A that you get from a wall/car/high power usb port.
the app is showing +257mA with GPS on and functioning normally.
So charging good here... Might be something with your motorola charger? It could have a sensor in it to detect 'trickle charging mode' that is improperly engaging when connected to the HTC causing the charger to put out a minimal 'sustain only' level of amperage.
good luck!
Click to expand...
Click to collapse
Possible, but says AC charging in Battery Monitor widget. I will post a few pics.
Here are a few Pics. you can see a couple of things.
-Charger rated at 950 MA out. and no other phone I have owned lost a charge while driving including TBolt, Charge, Bionic.
-Shows as AC charging
- Spikes of good charging detected
Put on Normal power mode today on the way in. live wallpapers did not wrok, just flickered. 3G on vice 4G. Battery still went down, but above 90% on 40 minute drive in. Screen low but on. Bluetooth speaker.
Maybe it is the iBolt car mount. See review online. will try without dock this afternoon on my way home.
-----------------------------------------------------
User: marc frederick, Nov 25, 2011
Pros: Options for different backs
Cons: Does not charge the phone while it is in use
Try playing pandora when the phone is 100 charged. After 45 minutes on the car mount (and yes it is plugged into a charger and all indicatros show it is charging) and the charge level is 84. Using the same charger but plugged into the phone, playing Pandora for 45 min starting charge level 68. Ending charge level is 100.
Yeah, something is telling that charger to not give you full juice
Rezound
ok, drove home off the window mount and just on charger, all same except full brightness on screen.40 minute drive. came up 7% battery vice down from 100 to 43%. nedd a few trials to confirm, but looks like window mount is throttleing juice.
thatsricci said:
are you absolutely sure the charger is giving the full 1A?
What sensor app are you using to see the battery discharging?
Click to expand...
Click to collapse
i have seen spurts up to 913 with GPS off and screen just turned on. Using battery monitor widget. Not on window mount, just charger.
I can confirm. The car dock will not charge your phone atleast not with the screen on and nothing else running but battery monitor widget.
I bought one and tested it extensively yesterday. I used a Verizon 1a charger and a generic 1a charger. With the dock and both chargerz the phone DIScharged(as in LOST battery power) at between 100ma and 200ma. Without the dock using the same chargers and changing nothing on the phone the phone charged at between 50a and 300ma.
I did the test several times to eliminate any random things the phone may have been doing in the background.
After doing that controlled test I played with it some more and no matter what I did I could not get a positive charge with the dock attached even in airplane mode with the screen backlight at minimum. Without the dock using the same chargers i ran Pandora and a police scanner both outputting through the phone speaker, gps, wifi, mobile all on, and screen on auto and still had a very small positive charge.
Moral of the story DO NOT BUY THIS DOCK unless you dont mind it just being a piece of plastic that holds your phone in place.
I wonder if there's a quick mod to it to get it working right. Like the soldering of the USB chargers I've seen.
Rezound
I just went ahead and bought an extra battery so I wouldn't have to charge in the car. Only takes 20 seconds to pop in a new battery.
Can charge both batts while I sleep at night.
Sent from my Galaxy Tab 10.1
I was looking for a high current charger for my Android tablet and there was a review that talked about compatibility. Some of the high cap chargers appear to be designed for Apple products and the pin wiring is subtly different. So, on some non-Apple products, the charge is only recognized as a lower power, 500mah charger and the users reported that some devices would normally charge and others would not. Some of the dual port charges also split the power. The 2.1 amp port and the 1 amp port cannot be used at the same time, depending on what is plugged into them. This was also brand specific. I ordered the Amazon Basics 2.1 amp dual charger and will see how that works. I have noticed a difference in charge rates between my Motorola charger left over from the Blackberry and the Verizon OEM one. The VZW one is faster.
I do the same thing I have been doing since my Windows phone days.
I use the AC cord plugged into a 12v to AC adaptor(screen set to 100% bright and no timeout).
I drove 6 hours last week ruuning Google Maps/GPS & my battery was 100% charged when I got to my destination.
~John
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!
Click to expand...
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
Click to expand...
Click to collapse
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
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