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I know that I probably shouldn't let the battery run so low on my Kindle Fire, but occasionally I have let it dip below 5%. Once this happens, the device no longer let's me trickle charge, and it powers itself down, even while plugged in.
Is there a way to override this setting? Sometimes I want to finish something up before letting it rest and charge up completely. To what extent does it damage the battery to run it so low?
Unfortunately this is not possible. The exact explanation for this actually comes from Android. Buried deep within the Android source code is this little gem:
private void shutdownIfNoPowerLocked() {
if (mBatteryLevel == 0 && !isPoweredLocked(BatteryManager.BATTERY_PLUGGED_ANY)) {
[...]
This basically forces the system to shutdown if the battery level reaches 0%. The isPoweredLocked function determines whether any of the following are true:
It should also be noted (as Jason mentioned in his comment) that lithium-ion batteries typically power off when they reach a predetermined low voltage to prevent further discharge and consequent damage.
