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The two most likely causes: The battery could be dead. Lithium-ion batteries (as well as other types of rechargeable batteries) wear down over time. Even sitting on a shelf they eventually decay, but they decay faster the more you use them, and the more they're exposed to extreme heat, cold, and humidity. The socket on the phone has a loose connection. ...


3

Yes, it's definitely possible. Most USB chargers are fairly limited in their output and devices like tablets are not really designed to be used while charging, unlike laptops. You'd think it would be OK to simply sit and remain on while charging and unused, but perhaps the Nexus 7 does not have very good power management. You might want to look at having ...


1

TL;DR: There's no danger in plugging a USB device into a charger with a higher amp rating than the one supplied with it. For mobile devices that use USB chargers, the difference between using chargers with different amp ratings in most cases is that the device will charge faster or slower, in direct proportion the the amp rating. In some cases, the ...


1

Your phone (or possibly the battery) is faulty. Return it to the shop for a replacement.


1

No, it will not damage your phone. As long as it's a micro USB charger, it will be fine. 5.5V is fine, I've had success with 6 Volts from a homemade charger, and you won't meet voltages higher than 5.5V on a micro USB charger anyway. Extra Volts are dangerous, so it's good to be cautious but 5.5V will not do any harm. The current rating (Amperes, A) does ...



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