I recently purchased the Scosche reVOLT c2 dual usb car charger. Being 2.1A, I was hoping it would work with my new Prime. Unfortunately that is not the case. It's a nice product and works we with all my other USB devices, but no luck with the TF. Unless anyone has any ideas to make it work, avoid this if you are looking to charge your Prime.
-ajs
Even though most car chargers run off 12VDC input, they output only 5V for usb devices. The TF itself should trickle-charge with 5V, but in order to actually fast charge it (or charge while in-use), it requires [email protected] or more (give or take).
You need at least 12v output to charge the Prime at a normal rate. 15v is ideal. Standard USB is 5v.
+1 ^^ although I think I did read somewhere that the Prime will trickle charge on USB if it's off or "not in use"? Can't recall where I saw this...
Xxxxxxxxxxx
Yes, the Prime will charge on a standard USB port, but it will do so very slowly. I have done so myself.
Sent from my SCH-I500 using XDA App
Sorry, delete it.
Related
http://maxborgesagency.com/press/bracketron-launches-dual-usb-charger/
$24.99 dual USB Cigarette lighter adapter 1 & 2 amp
Reeves360 said:
http://maxborgesagency.com/press/bracketron-launches-dual-usb-charger/
$24.99 dual USB Cigarette lighter adapter 1 & 2 amp
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Unfortunately, worthless.
Transformer needs 11v-15v to charge reasonably well. Any 5v charger, even at 1000000 amps, will not charge the TF with screen lit, or charge takes days with TF turned off.
Much harder to find auto chargers in the 11v-15v range, some that say 12v are actually not. I found one advertised as 12v (that measures 9.8v actually) and it also did not charge TF. Good luck.
Wont work. Unlike most devices the Transformer does not use 5v to charge like the iPhone and many other Android devices. It does use USB but it will only charge via Asus's special chargers. This is because our Transformers charge via 15volt and the charger cable is actually a USB 3.0 cable that has extra pins in back, and the 15volt pin is one of these extra pins the USB 3.0 layout provides.
Edit Bob Smith42 beat me to it by a few seconds lol
Be aware that it's incorrect to say that the TF won't charge from a standard USB charger. It does charge however it only trickle charges and therefore takes much longer. So let's make sure we are clear when we respond about what works and what doesn't. I used my iPad 2 amp charger on the TF and went from about 30% charge to about 85% charge in about 6 hours (screen off). The absolute fastest way to trickle charge from a generic adapter is with the TF powered off. Hopefully Asus will come out their own car adapter for the TF.
The charger that the original poster mentioned WILL trickle charge the TF. Also new TF users should know that the TF will not give any charging indications when plugged into anything other than the Asus charger - but it is trickle charging none-the-less.
w4rmk said:
The charger that the original poster mentioned WILL trickle charge the TF. Also new TF users should know that the TF will not give any charging indications when plugged into anything other than the Asus charger - but it is trickle charging none-the-less.
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One thing to mention that you can do if you have the tock is trickl-echarge THAT while still using the pad... then in 5-6 hours when the padd is getting low, you can dock it, and it will charge off of the dock while you keep using it. Once fully charged, undock it again, etc. This is what I want to do, and why I want a second USB cable.
Firstly, how many cells is the Lithium battery in the tablet? In other words what is the voltage of the battery at full charge?
It looks like it requires a 12V adaptor to charge, so that means you couldn't use the wall adaptors for like a smartphone like the Droid X that puts out 5v at 1A?
I ask because on asus' webpage documenting the charger it says 5v 2A or 15V 1.2A (EeePad only).
If you haven't seen it, give this a read.
The first topic there addresses the 5v and 15v nature ...
So, the Prime does need 13V to charge? It can't charge on 5V, like a USB port?
I also wanted to get this:
http://www.amazon.com/New-Trent-iDu...0Q42/ref=sr_1_4?ie=UTF8&qid=1325117562&sr=8-4
As a backup when traveling but it only puts out 5V, it says it will charge an iPad will it charge the prime?
curreyr said:
If you haven't seen it, give this a read.
The first topic there addresses the 5v and 15v nature ...
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Thanks for the link on 5v vs 15v. I had read this before but forgot about. I have added this information to my accessory guide.
Ultimate Transformer PRIME TF201 Accessory Guide
http://forum.xda-developers.com/showthread.php?p=20013463#post20013463
Are the TF101 and TF201 wall chargers compatible with each other?
I thougth I read that they were the same adaptor but I'm not sure. I'm still wondering if the prime charges when plugged in the computer.
hyrulejedi86 said:
I thougth I read that they were the same adaptor but I'm not sure. I'm still wondering if the prime charges when plugged in the computer.
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I think I read that it needs to be a wall charger, wont charge from the pc since it needs 12v to charge.
That's a little inconvenient I wish I could have gotten that external battery as a backup...
bizdady said:
Are the TF101 and TF201 wall chargers compatible with each other?
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YES, I ordered the TF101 charge on December 8 taking a gamble that it was the same for the TF201. I received the keyboard on Dec 21 which I have charged with this charger. I also ordered up a couple of the 5ft USB cables. My PRIME arrives today.
Just looking to confirm what I think I've deduced from the forum.
I can't charge my transformer when it's on or asleep with a standard USB charger, correct? I've invested in 2 different 2.0+ Amp 5V USB supplies and none seem to get the charge going on the Transformer. It sounds like I could turn OFF the unit and trickle charge it (by the way would the 2.0A charger be of any benefit in this circumstance?). It also sounds like the ASUS charger gives off 12V and that's what the Tranformer is expecting to get the charge going, right? If so, I'm definately dissappointed that ASUS went this approach- non-standard. I always like extra chargers for traveling and throughout the house and this has limited me. Anyway, if someone would be so kind as to reply to this and confirm I've read the threads correctly, I'd appreciate it.
The ASUS charger is 15V.
5V isnt nearly enough. If you got it powered OFF, you might be able to get it to full (from empty) in a few days (yes, days).
The TF can be charged normally with 10-15V.
I suggest you read this thread to get some other ideas.
Yea you need a 2 plus amp carger which also is 15 plus volts, and if you want to make your stock charge cable longer you have to use a male+female 3.0 usb cable... a 2.0 usb cant transfer enough power quick enouqh
Sent from my Transformer TF101 using XDA Premium App
nbgorman said:
Yea you need a 2 plus amp carger which also is 15 plus volts, and if you want to make your stock charge cable longer you have to use a male+female 3.0 usb cable... a 2.0 usb cant transfer enough power quick enouqh
Sent from my Transformer TF101 using XDA Premium App
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So much misinformation in this post...
First... The real wall charger is 15v 1.2A. So the 2 amp is just bs...
Second... A usb 2.0 cable transfer power just as "quick" (wut?) as a usb 3.0.
The reason you need a 3.0 cable is because the charger is looking for connection on a pin only present on a usb 3.0 cable. If you dont use a usb 3.0 cable the wall charger will only send 5V.
This is done this way so you can use the wall charger for other devices apart from the TF.
You can open the charger up and bridge 2 connections to make it send 15v all the time. Then you can use a usb 2.0 cable just fine.
Please, try not to spread false information.
Goatshocker said:
So much misinformation in this post...
First... The real wall charger is 15v 1.2A. So the 2 amp is just bs...
Second... A usb 2.0 cable transfer power just as "quick" (wut?) as a usb 3.0.
The reason you need a 3.0 cable is because the charger is looking for connection on a pin only present on a usb 3.0 cable. If you dont use a usb 3.0 cable the wall charger will only send 5V.
This is done this way so you can use the wall charger for other devices apart from the TF.
You can open the charger up and bridge 2 connections to make it send 15v all the time. Then you can use a usb 2.0 cable just fine.
Please, try not to spread false information.
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Ahhh i see i read on the android forums that it was because the usb 2 didnt "move enough energy" i didnt realize it was because of a pin in the actual wall charger thanks for clearing that up
Sent from my Transformer TF101 using XDA Premium App
Goatshocker said:
Please, try not to spread false information.
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I appreciate your knowledge- but please, try not to be a condescending jerk. They obviously didn't KNOW the information was false.
Goatshocker said:
So much misinformation in this post...
First... The real wall charger is 15v 1.2A. So the 2 amp is just bs...
Second... A usb 2.0 cable transfer power just as "quick" (wut?) as a usb 3.0.
The reason you need a 3.0 cable is because the charger is looking for connection on a pin only present on a usb 3.0 cable. If you dont use a usb 3.0 cable the wall charger will only send 5V.
This is done this way so you can use the wall charger for other devices apart from the TF.
You can open the charger up and bridge 2 connections to make it send 15v all the time. Then you can use a usb 2.0 cable just fine.
Please, try not to spread false information.
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Before you correct people how about you do your research first.
Actually if you read the wall plug it is a 15v 2-1.2A. You can DIY a charger as long as it can produce 11v+ at 1.2A-2A and will trigger the charge functions within the tab. USB 3.0 is only required with the stock charger.
Dynex sold "The Ultimate Charger DX-UA" that had a MAX setting of 11v but when tested actually produced 11.7v at 1.7A. I was able to find one but they are rare now bc they haven't been making them for over a year now. It comes with aton of adapters one being a USB. I use it often without issue.
Also they sell on Ebay USB car charger adapters rated at 12v at 2.0A I own one of these also and it works great with the stock cable.
http://forum.xda-developers.com/showthread.php?t=1087321
For more information.
zedorda said:
Before you correct people how about you do your research first.
Actually if you read the wall plug it is a 15v 2-1.2A. You can DIY a charger as long as it can produce 11v+ at 1.2A-2A and will trigger the charge functions within the tab. USB 3.0 is only required with the stock charger.
Dynex sold "The Ultimate Charger DX-UA" that had a MAX setting of 11v but when tested actually produced 11.7v at 1.7A. I was able to find one but they are rare now bc they haven't been making them for over a year now. It comes with aton of adapters one being a USB. I use it often without issue.
Also they sell on Ebay USB car charger adapters rated at 12v at 2.0A I own one of these also and it works great with the stock cable.
http://forum.xda-developers.com/showthread.php?t=1087321
For more information.
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+1, I've been using the same charger for about a year myself. Also without any issues whatsover.
You can still find them on eBay occasionally.
Regards.
zedorda said:
Before you correct people how about you do your research first.
Actually if you read the wall plug it is a 15v 2-1.2A.
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Actually I think youre the one who should read the text on the wall plug.
It clearly says "15v - 1.2A". the 2A is for 5v. Not 15. 5.
digibucc said:
I appreciate your knowledge- but please, try not to be a condescending jerk. They obviously didn't KNOW the information was false.
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If they don't KNOW whether the information they are posting is true or false, then they shouldn't be posting it at all. That's just common sense.
I just want to make sure I am clear on the whole 5V, 5V+ charging. Is it true if you can some how provide 12V over USB (yes this is sort of a hack) you can get reasonably decent charging rates? I ask because I'm in the market for a large portable battery pack (in the 10Ah 3.7V range). Some of them provide 12V output to a DC barrel plug.
Someone in the original Transformer prime suggest buying a DC plug to female USB plug adapter off eBay. They sell multiple sizes of these, so I figured that if I can find the right size adapter for the DC plug, the battery pack should be able to charge my Prime? The only problem is if I pull a brain fart and accidentally plug my phone in that
Somewhere in the forum is a thread about DIY chargers ....maybe under accessories.....gives the pins for USB3 connection, and maybe USB2....The ASUS connection is USB3....different power pins from usb2
Has anyone successfully used a 12v usb charger other than the BN ripoff? I have a gmax 2.1a and aluratek 2a and neither one will charge the bn tablet. I get the "not charging" message on the tablet.. so I supposed its getting some juice, but not enough to sustain it. I soldered d+/d- together on both adapters and now both will show ac charging in the nexus - so I know each is getting close to 1amp. Ironically, the tablet will show ac charging if I use the nexus power ac power cube which is rated at 5v / 1amp output. So you would think the 12v usb adapters which are rated the same would work as well.
thoughts?
darby427 said:
Has anyone successfully used a 12v usb charger other than the BN ripoff? I have a gmax 2.1a and aluratek 2a and neither one will charge the bn tablet. I get the "not charging" message on the tablet.. so I supposed its getting some juice, but not enough to sustain it. I soldered d+/d- together on both adapters and now both will show ac charging in the nexus - so I know each is getting close to 1amp. Ironically, the tablet will show ac charging if I use the nexus power ac power cube which is rated at 5v / 1amp output. So you would think the 12v usb adapters which are rated the same would work as well.
thoughts?
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did you read about the 'special' connector that is deeper than the normal ones ? please use the search function for more info.
sure did.. all of this was with the [email protected] cable..
old_fart said:
did you read about the 'special' connector that is deeper than the normal ones ? please use the search function for more info.
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There's also the part of the equation where the USB adapter must supply a lot more than the 500mA of current that most adapters and computer USB ports are limited to. Mine will say "charging" as long as the adapter puts out around 1A (1000mA) or more and I use the NT's supplied cable. <-- But it still won't charge as quickly as it does when I use a 2A charger such as the one it came with. The factory charger is around 2A and expecting the NT to charge with anything less may not result how you'd like. Just because your phone likes a charger doesn't mean your NT will.
There is more to it than just shorting the D+ and D- pins. If the charger was designed for iPad, then you will also need to remove 4 resistors. Check out the two links in my post relating this issue at http://forum.xda-developers.com/showthread.php?t=1614091
I modded a car charger by just shorting the two pins. My HTC EVO 4G phone showed AC charging but my NT showed USB charging. I opened it up again and removed the resistors network and NT showed AC charging right away. Good luck.
bigdogz - good advice - made an attempt at it but my eyesight and hand steadiness aint what it used to be However, I did find one that works - Scosche reviveII - GUSBC3. Its a 2.1a port for the galaxy tab and a 1amp port for apple. It charges both the galaxy tab 10.1 and the nook tablet on the 2.1a port. It also will charge in ac mode a galaxy nexus from the tab port. The 1a port does not have the d pins shorted, but will charge an iphone.