08-15-2012 09:25 AM
I have been having a very hard time keeping my tablet charged. Using the A/C adapter included with the device, I get only ~20% charge overnight (~8 hours), and I lose charge at a substancial rate if I use the tablet while charging. Furthermore, the device frequently wakes up (screen turns on) for no apparent reason while charging on it. Using the dock solves this issue, but it is too bulky to take on trips.
Previously I had assumed that this was an issue with the tablet. Today I realized that it is actually the charger which is at fault. Using a 1.5 adapter (as compared to the 2.1A stock one) I get much better charging rates-- ~45% overnight, and it actually charges while I am using it. I assume it would work even better on a functional 2.1+A charger.
I will be ordering the following charger as soon as I get back from vacation and will report on how it works:
Anyway, just wanted to share my experience in case anyone else is suffering from these problems and has not realized the cause. It is a shame to have this tablet be so completely ruined by an issue with a ~$10 charger.
08-16-2012 04:05 AM - edited 08-16-2012 04:10 AM
Be aware that the reason that the adapter provided with the TPT charges at a faster rate is that it has the USB data lines shorted together. The tablet senses this and thus knows that it can draw more current and charge faster.
Any adapter that doesn't short the data lines won't charge faster than a properly working TPT adapter and cable, no matter how much current it's capable of providing.
Also, the original adapter is rated 5.35V instead of the ususal 5.0V provided by a standard USB adapter. This may also affect how fast the tablet is able to charge.
08-16-2012 11:22 AM - edited 08-16-2012 11:22 AM
The shorting of the data lines is standard and should be the same in any good high-amp charger. The 5.35V a little less so, so that bit could be an issue. Perhaps I should actually bother to RMA my stock adapter :/
Anyway, thanks for the info. I didn't even think to look at the output voltage.