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TechniSol · 03-01-2015, 04:44 AM

It's possible the battery has discharged to too low a voltage to allow recharging in the device. Or that something has locked up -more likely the battery voltage is simply too low, which can damage a lithium battery pretty badly if allowed to discharge too far. If you're comfortable, you might try opening it up and disconnecting the battery cable from the pc board for a few seconds, reconnect and see if it'll charge then, but chances are you have a bigger problem.

Failing that, you can disconnect the battery and briefly charge it with an external source like a regulated power supply if you're extremely careful and limit the current and voltage while monitoring battery temperature. If you really find yourself in a bind three AA or better yet AAA(to limit available current) batteries in series might be safely used to jump start the charging process if used for a brief series of pulses to bring the battery voltage up to the point where it can be safely recharged. Frequent checking with a meter between brief charging "pulses" and noting of battery temperature would be advisable. Ideally you'd want to charge the battery just enough that the reader's internal charging circuitry can start up and recharge it safely. You need to be sure you understand what you're doing because you can easily blow a lithium battery up with nasty results. This is not for the uninitiated. Do not attempt this unless you understand all the risks and have the proper safeguards in place. Whatever you do, do not leave the battery charging directly off a power supply!!! Battery go boom, magic smoke get out, and may lead to more smoke and Firemen knocking on your door with an AXE! Saavy?

03-01-2015, 04:44 AM	#5
TechniSol GranPohbah-Fezzes r cool! Posts: 1,056 Karma: 3151024 Join Date: Jul 2010 Device: Nook STRs, Kobo Touch, Kobo Glo	It's possible the battery has discharged to too low a voltage to allow recharging in the device. Or that something has locked up -more likely the battery voltage is simply too low, which can damage a lithium battery pretty badly if allowed to discharge too far. If you're comfortable, you might try opening it up and disconnecting the battery cable from the pc board for a few seconds, reconnect and see if it'll charge then, but chances are you have a bigger problem. Failing that, you can disconnect the battery and briefly charge it with an external source like a regulated power supply if you're extremely careful and limit the current and voltage while monitoring battery temperature. If you really find yourself in a bind three AA or better yet AAA(to limit available current) batteries in series might be safely used to jump start the charging process if used for a brief series of pulses to bring the battery voltage up to the point where it can be safely recharged. Frequent checking with a meter between brief charging "pulses" and noting of battery temperature would be advisable. Ideally you'd want to charge the battery just enough that the reader's internal charging circuitry can start up and recharge it safely. You need to be sure you understand what you're doing because you can easily blow a lithium battery up with nasty results. This is not for the uninitiated. Do not attempt this unless you understand all the risks and have the proper safeguards in place. Whatever you do, do not leave the battery charging directly off a power supply!!! Battery go boom, magic smoke get out, and may lead to more smoke and Firemen knocking on your door with an AXE! Saavy? Last edited by TechniSol; 03-01-2015 at 04:53 AM.