The Nexus 7 has been my go-to tablet since receiving it less than two weeks ago. I have, however, run into a problem. It appears that the tablet may have issues when used with third party chargers. In my case, I found that the Energizer E1129701 10w USB Charger charger that I’ve used with an Apple iPad 2 and a Samsung Galaxy Tab 2 7.0 does now work with the Nexus 7. I tried using the USB cable that came with the Nexus 7 to eliminate the possibility of a cable problem. However, this 2.1A charger was still not able to charge the Nexus 7.
A discussion over at XDA Developers indicates mixed results with a variety of third party chargers. Chargers for the Kindle Fire and HP TouchPad, interestingly, can charge the Nexus 7.
My experience with the third party chargers I have is that they all charge the Nexus 7 when in sleep mode or powered down. A recent update however (4.2.1?) has changed this so my chargers now charge the N7 when powered on.
Chargers for galaxy tab works for the Nexus 7. I found it odd that my 7 doesn’t charge on an ipad charger. The thing is I had the same problem with my galaxy tab, which wasn’t compatible with ipad chargers, although they all have the same output capacity of 2.1A. Weird.