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Battery management

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mcer12 edited this page Sep 4, 2019 · 3 revisions

The device has built-in battery sensing, using high resistance voltage divider. You can check current battery level in config AP. You can also send battery percentage with button press (you can set this in config AP). Just keep in mind that the percentage is just a rough estimation and is non-linear. So if you're at 20% it might be a good idea to recharge even though it should be OK for another month or more.

  • Voltage below 3.5V is interpreded as 0%.
  • Battery protection cuts power at 2.9V, if you drain battery completely.
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