Help Yet another charger question

[bergie33]

I have looked all over the internet for an answer for this, with no luck. I have an ASUS TF300T Transformer tablet. I want to be able to carry one charger when I travel to use for both my tablet and phone. The ASUS charger has two ratings on it, 5V @ 2.1a and 15V @ 1.5a. I know that devices pull necessary amps, and a higher amp rating will not damage a device, but could allow faster charging. the voltage on the other had, could be a problem.

My question is, what determines if the charger is running 15v @ 1.5a vs. 5v @ 2.1a? I don't want to plug in my Droid RAZR HD and have the charger kick it's butt with 15v.

 

[GuitarG20]

That is a good question. I'm not too familiar with electrical stuff, but I can try and help till someone with more knowledge jumps in. What is the rating on the charger for your phone?

 

[Harry2]

As far as I've understood this xda-developer post, with a USB 3.0 cable you'd get 15V and with the USB 2.0 cable you'd get 5V ...
http://forum.xda-developers.com/showthread.php?p=30955703

Harry

 

[bergie33]

As far as I've understood this xda-developer post, with a USB 3.0 cable you'd get 15V and with the USB 2.0 cable you'd get 5V ...
http://forum.xda-developers.com/showthread.php?p=30955703

Harry

That is a great thread. I missed that one. Good explanation of the dual voltage nature of the charger. Thanks.


FYI, the stock charger is 5v @ 850mah