The Sting contains a 2500mAh single cell Lithium Polymer battery. 

The Sting reports a battery voltage in analogue 1. It does not currently report a battery capacity percentage.

  • A fully charged battery measures 4.15-4.20V.
  • The battery will be too flat to operate the unit between 3.30-3.50V
  • The "Battery Good" status flag will turn off below 3.725V, which is about 22%. This flag can be used to trigger low battery alerts.