Homey Community Forum

Fibaro motion sensor battery drop

Hi,

I’ve got 2 fibaro motion sensors installed. Now since recently one of them suddenly shows a dramatic drop in battery level. Seems quite strange as the older one is still around 100%

Anyone else experiencing this?

For me, it seems to depend very much on the brand of the battery used.

Looking back at my last battery change:

  • 100% for 4 months
  • 92% for 3-4 days
  • 74% for 3-4 days
  • Then it died suddenly, requiring battery replacement.

The one before that:

  • 100% for about 6 weeks
  • Steady decline to 33% over the next 6 weeks
  • Sudden drop to 1%, stayed working for about a month

Current battery:
Right now it’s been 100% for a little over 3 months.

In any case, sudden drops don’t really surprise me. Battery level indicators are based on voltage, but battery manufacturers try hard to deliver a more or less equal voltage until the last moment, so devices continue to work normally for as long as possible. This does make battery indicators somewhat useless though :slight_smile: