Go Back   Android Forums > Android Tablets & MIDs > ASUS Eee Pad Transformer Prime

Get excited for the Samsung Galaxy S5! Find everything you need and discuss it in our Galaxy S5 Forum!

Like Tree1Likes
  • 1 Post By theandies

test: Reply
 
LinkBack Thread Tools
Old August 17th, 2012, 02:59 AM   #1 (permalink)
Junior Member
Thread Author (OP)
 
Join Date: Jul 2012
Posts: 22
 
Device(s):
Carrier: Not Provided

Thanks: 4
Thanked 0 Times in 0 Posts
Default Proper amperage for charging

Looking to get a secondary charger and possibly a car charger and not looking to pay OEM retail.

The print on included OEM charger reads: Output 5-15V & 2-1.2A (2-1.2A)
Then, below that in another language it separated this to 5V @ 2A or 15V @ 1.2A

My first question is what does this specific inverter actually output? If both, how/when does it know which one to choose?
and
Which one of these juice specs is ideal for prolonging battery life and charge cycles?
I would assume the lower amperage, but 5V is basically universal as far as mobile device charging goes..

SigNu747 is offline  
Reply With Quote
sponsored links
Old August 17th, 2012, 07:22 AM   #2 (permalink)
Premium Member
 
MSUgEEk's Avatar
 
Join Date: Apr 2010
Location: Northwestern Alabama
Posts: 3,684
 
Device(s): Galaxy Nexus
Carrier: Verizon

Thanks: 420
Thanked 1,622 Times in 956 Posts
Default

5V @ 2A is typical for tablets. Any charger that outputs that should be fine.
__________________
If someone has helped you, hit the THANKS button.
If you just like a post for some reason, click LIKE.
If you see a trouble-maker, hit REPORT!
MSUgEEk is offline  
Reply With Quote
Old August 20th, 2012, 08:20 AM   #3 (permalink)
Junior Member
 
Join Date: Apr 2012
Posts: 38
 
Device(s):
Carrier: Not Provided

Thanks: 0
Thanked 1 Time in 1 Post
Default

Simple 5V won't cut it for you. If it did, TF would charge from USB port on PC. I am afraid you need 15V one and that might be hard to get as USB because it's totally off the standards.
KouDy is offline  
Reply With Quote
Old August 20th, 2012, 09:18 AM   #4 (permalink)
Premium Member
 
MSUgEEk's Avatar
 
Join Date: Apr 2010
Location: Northwestern Alabama
Posts: 3,684
 
Device(s): Galaxy Nexus
Carrier: Verizon

Thanks: 420
Thanked 1,622 Times in 956 Posts
Default

Quote:
Originally Posted by KouDy View Post
Simple 5V won't cut it for you. If it did, TF would charge from USB port on PC. I am afraid you need 15V one and that might be hard to get as USB because it's totally off the standards.
Tablets won't charge via USB because of amperage, not voltage. USB amperage from computers are limited to 500mA. ASUS apparently has something in their charging circuits that allow for faster charging at 15V @1.2A, however, it will also charge with the 5V @ 2.0A. Your standard 5V @ 2.0A will charge virtually any tablet. The 15V @ 1.2A for ASUS is just a faster charge option for ASUS products.
MSUgEEk is offline  
Reply With Quote
Old August 23rd, 2012, 09:35 AM   #5 (permalink)
Senior Member
 
ylexot's Avatar
 
Join Date: Apr 2010
Location: Saint Inigoes, MD
Posts: 2,336
 
Device(s): VZW Galaxy S3, Transformer Prime, Droid X (ret)
Carrier: Not Provided

Thanks: 17
Thanked 403 Times in 324 Posts
Default

Sorry svt_gEEk, but you are apparently talking about something you know nothing about. The Transformer Prime requires 15V charging. It will not charge on USB. It is not "virtually any tablet". It is an exception.
ylexot is offline  
Reply With Quote
Old August 23rd, 2012, 10:47 AM   #6 (permalink)
Premium Member
 
MSUgEEk's Avatar
 
Join Date: Apr 2010
Location: Northwestern Alabama
Posts: 3,684
 
Device(s): Galaxy Nexus
Carrier: Verizon

Thanks: 420
Thanked 1,622 Times in 956 Posts
Default

Quote:
Originally Posted by ylexot View Post
Sorry svt_gEEk, but you are apparently talking about something you know nothing about. The Transformer Prime requires 15V charging. It will not charge on USB. It is not "virtually any tablet". It is an exception.
Never said it would charge on USB.
MSUgEEk is offline  
Reply With Quote
Old August 23rd, 2012, 02:06 PM   #7 (permalink)
Senior Member
 
ylexot's Avatar
 
Join Date: Apr 2010
Location: Saint Inigoes, MD
Posts: 2,336
 
Device(s): VZW Galaxy S3, Transformer Prime, Droid X (ret)
Carrier: Not Provided

Thanks: 17
Thanked 403 Times in 324 Posts
Default

Quote:
Originally Posted by svt_gEEk View Post
Never said it would charge on USB.
It won't charge on 5V either.
ylexot is offline  
Reply With Quote
Old August 23rd, 2012, 04:17 PM   #8 (permalink)
Premium Member
 
MSUgEEk's Avatar
 
Join Date: Apr 2010
Location: Northwestern Alabama
Posts: 3,684
 
Device(s): Galaxy Nexus
Carrier: Verizon

Thanks: 420
Thanked 1,622 Times in 956 Posts
Default

My apologies if it doesn't. My Asus made Nexus 7 does and every other tablet does. Transformer prime must be an odd ball. I do realize there is a 15V output on that charger, but there is also a 5v @2A output as well
MSUgEEk is offline  
Reply With Quote
Old August 28th, 2012, 07:44 AM   #9 (permalink)
Need Beer and Mustard
 
breadnatty08's Avatar
 
Join Date: Nov 2009
Location: District of Columbia
Posts: 17,774
 
Device(s): LG G2, Moto G, Galaxy S3, Galaxy Nexus LTE, Nexus 7, HTC Flyer
Carrier: Verizon

Thanks: 5,735
Thanked 5,422 Times in 3,575 Posts
Default

Was going to start another thread, but figured I'd dovetail this one.
Been scratching my head about my Prime, but apparently it requires its original charger as none of my other wall chargers work on it (incl. the one for my N7, nor does my PC as ylexot said). Little bit of a bummer as I'm not sure where it is.
__________________
New to the forum? Check out the FAQ
Haven't signed up? Join the best Android Forum out there!
Sign up here
breadnatty08 is online now  
Reply With Quote
Old August 29th, 2012, 08:32 PM   #10 (permalink)
Member
 
theandies's Avatar
 
Join Date: Jan 2011
Location: Warrenton, Va
Posts: 313
 
Device(s): htc Aria - Retired :-( Transformer Prime Nook Color (Rooted) htc Vivid
Carrier: Not Provided

Thanks: 25
Thanked 56 Times in 42 Posts
Default

Wow, Manuals are great:


It will charge on the USB port but it has to be turned off and it takes forever. My adaptor messed up while on vacation and I had to use the USB port to charge it and from about 20% to 100% took overnight on the USB and the Prime turned off.
KENNECTED likes this.
theandies is offline  
Reply With Quote
The Following User Says Thank You to theandies For This Useful Post:
breadnatty08 (August 30th, 2012)
sponsored links
Old August 30th, 2012, 04:32 AM   #11 (permalink)
Need Beer and Mustard
 
breadnatty08's Avatar
 
Join Date: Nov 2009
Location: District of Columbia
Posts: 17,774
 
Device(s): LG G2, Moto G, Galaxy S3, Galaxy Nexus LTE, Nexus 7, HTC Flyer
Carrier: Verizon

Thanks: 5,735
Thanked 5,422 Times in 3,575 Posts
Default

This thing came with a manual?
JK, thanks for the info. I recall when I talked to HTC about my bricked Flyer he said the same thing about ONLY using the charger which came with the device.
breadnatty08 is online now  
Reply With Quote
Old August 30th, 2012, 05:44 AM   #12 (permalink)
Senior Member
 
ylexot's Avatar
 
Join Date: Apr 2010
Location: Saint Inigoes, MD
Posts: 2,336
 
Device(s): VZW Galaxy S3, Transformer Prime, Droid X (ret)
Carrier: Not Provided

Thanks: 17
Thanked 403 Times in 324 Posts
Default

Quote:
Originally Posted by dreadnatty08 View Post
This thing came with a manual?
JK, thanks for the info. I recall when I talked to HTC about my bricked Flyer he said the same thing about ONLY using the charger which came with the device.
Manuals will always say that to protect the manufacturer against the liability of damage caused by someone else's charger. However, the Prime has an additional reason in the needed voltage that USB chargers don't typically provide.
ylexot is offline  
Reply With Quote
Old August 30th, 2012, 07:44 AM   #13 (permalink)
Member
 
Join Date: Jan 2012
Location: Birmingham, UK
Posts: 163
 
Device(s): Galaxy Nexus, Transformer Infinity
Carrier: Not Provided

Thanks: 7
Thanked 11 Times in 10 Posts
Default

The official charger that comes with the Infinity is rated for 15V@1.2A, or 5V@2A, so I'm pretty sure it's safe to say that anything outputting 2 amps at 5 volts will charge the Prime (I can't see why it would change between the different tabs). My TF700 is on my bed right now charging from my external battery which does 5V@2A, with no problems or heat issues so far.
Kookas is offline  
Reply With Quote
Old August 30th, 2012, 07:55 AM   #14 (permalink)
Senior Member
 
ylexot's Avatar
 
Join Date: Apr 2010
Location: Saint Inigoes, MD
Posts: 2,336
 
Device(s): VZW Galaxy S3, Transformer Prime, Droid X (ret)
Carrier: Not Provided

Thanks: 17
Thanked 403 Times in 324 Posts
Default

Ok, so it sounds like it will charge on 5V...just really slowly.

15V * 1.2A = 18W
5V * 2A = 10W

So, charging with 5V at 2A (which is pretty rare) will charge at about half the rate of the 15V at 1.2A that the stock charger puts out.

BTW, I'd bet that the only reason that the stock charger puts out 5V is because it uses a USB port. If it only put out 15V, somebody would plug something else into it and fry their device.
ylexot is offline  
Reply With Quote
Old September 1st, 2012, 08:57 AM   #15 (permalink)
Member
 
theandies's Avatar
 
Join Date: Jan 2011
Location: Warrenton, Va
Posts: 313
 
Device(s): htc Aria - Retired :-( Transformer Prime Nook Color (Rooted) htc Vivid
Carrier: Not Provided

Thanks: 25
Thanked 56 Times in 42 Posts
Default

I tend to agree with you ylexot. I do use my Prime charging brick to charge my htc Vivid and it works fine.
theandies is offline  
Reply With Quote
Old September 1st, 2012, 09:05 AM   #16 (permalink)
Member
 
theandies's Avatar
 
Join Date: Jan 2011
Location: Warrenton, Va
Posts: 313
 
Device(s): htc Aria - Retired :-( Transformer Prime Nook Color (Rooted) htc Vivid
Carrier: Not Provided

Thanks: 25
Thanked 56 Times in 42 Posts
Default

Quote:
Originally Posted by dreadnatty08 View Post
This thing came with a manual?
JK, thanks for the info. I recall when I talked to HTC about my bricked Flyer he said the same thing about ONLY using the charger which came with the device.
I know right! Pretty much everything comes with a crappy "Getting Started" two page guide on how to turn on your new device and no real manual. When I get a new device I always go to the manufacturers site and search for complete manual. Some are really good and have good information, some are just one step up from the "Getting Started" guide.
theandies is offline  
Reply With Quote
Old September 15th, 2012, 11:11 PM   #17 (permalink)
Junior Member
Thread Author (OP)
 
Join Date: Jul 2012
Posts: 22
 
Device(s):
Carrier: Not Provided

Thanks: 4
Thanked 0 Times in 0 Posts
Default I think I found a winner

Proper volts/amps and under $10

http://www.amazon.com/POWER-ADAPTER-TRAVEL-CHARGER-TRANSFORMER/dp/B007LI1UOE/ref=wl_it_dp_o_pdT1_nS_nC?ie=UTF8&colid=10D9C1TFAO K9C&coliid=I3DJLGED61JVX5


Not a usb plug so address issue of needing the 5v/2a to keep from frying any other usb devices.


Any objections?
SigNu747 is offline  
Reply With Quote
Reply


Go Back   Android Forums > Android Tablets & MIDs > ASUS Eee Pad Transformer Prime
Thread Tools

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On



All times are GMT -5. The time now is 05:16 PM.
Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2014, vBulletin Solutions, Inc.