title_body: How do I override the power cycling when the battery gets below 5%? 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?
upvoted_answer: 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:
  
  BatteryService.java:239
  
  private void shutdownIfNoPowerLocked() {
      if (mBatteryLevel == 0 &amp;&amp; !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:
  
  
  The battery status is unknown
  The device is connected to AC
  The device is connected via a USB cable
  The device is within range of a wireless charger
  
  
  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.