# Fibaro motion sensor battery drop **URL:** \ **Category:** Questions & Help\ **Created:** [February 9, 2020, 12:04pm UTC](https://community.homey.app/t/fibaro-motion-sensor-battery-drop/25677 "2020-02-09T12:04:28Z")\ **Posts on this page:** 2\ **Page:** 1
**Author:** ![Inunekko](https://sea1.discourse-cdn.com/flex025/user_avatar/community.homey.app/inunekko/32/13815_2.png) [@Inunekko](https://community.homey.app/u/Inunekko)\ **Post date:** [February 9, 2020, 12:04pm UTC](https://community.homey.app/t/fibaro-motion-sensor-battery-drop/25677/1 "2020-02-09T12:04:29Z")
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? ![image](https://us1.discourse-cdn.com/flex025/uploads/athom/original/3X/f/4/f4aa60da3b43037e58f90a0a55044064aff24d15.jpeg) ---
**Author:** ![Thorarin](https://sea1.discourse-cdn.com/flex025/user_avatar/community.homey.app/thorarin/32/5107_2.png) [@Thorarin](https://community.homey.app/u/Thorarin)\ **Post date:** [February 10, 2020, 8:25pm UTC](https://community.homey.app/t/fibaro-motion-sensor-battery-drop/25677/2 "2020-02-10T20:25:23Z")
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 🙂