Battery Life

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John Developer

21. Dezember 2016 20:16

The battery level as reported by our V.BTTNs is not behaving as expected.  New buttons report lower battery percentages and battery levels can change drastically from day to day—sometime even going up.

 

Can you provide some insight into what we are seeing? 

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• Offizieller Kommentar

  

  VSN Mobil Support 21. Dezember 2016 20:17

  The V.BTTN device periodically measures battery level using A/D built into the BLE chip.   Depending on when the measurement is taken, the result could be affected by battery droop due to the buzzer, LED and/or BLE chip being active.  The measurement result thus could vary from reading to reading.  

  So to avoid user confusion, we recommend you design the app to display battery level as a range (e.g. using color code) and not display a numerical percentage.

  Recommended range

  Good/Green > 20%

  Low/Yellow — 10% to 20%

  Critical/Red  < 10%

   

  We also recommend your app should not constantly read the battery level but should use the battery notification characteristic and let the V.BTTN notify your application when there is a change in the battery percentage.

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