Aqara · Smart home sensors
Aqara Motion Sensor P1 battery
2 × 3V lithium coin cell
How to replace it
| How to open | Open battery compartment; replace both CR2450 cells; reseat cover. |
|---|---|
| Notes | Replace both CR2450 cells together. |
| Access | Tool-free |
Important
- Generation: Motion Sensor P1 (MS-S02) uses 2× CR2450 — not 1× like original RTCGQ11LM.
Sources
Helpful for this device
Optional tools for opening, testing or charging — separate from the battery answer.
- Coin cell / button cell battery tester
Quick check of CR / LR / SR button and coin cells before fitting
- Fluke 101 Digital Multimeter
Accurate open-circuit voltage and basic electrical checks
- Digital multimeter
Measure open-circuit voltage and general electronics checks
New battery but still not working?
A fresh 2 × CR2450 should restore Aqara Motion Sensor P1 if the battery was the problem. Work through the checks below before replacing the device.
- Check the battery type
This device needs 2 × CR2450 (lithium). Rechargeable cells are not supported for this device. Same size does not always mean the same battery.
- Check known model-specific issues
Generation: Motion Sensor P1 (MS-S02) uses 2× CR2450 — not 1× like original RTCGQ11LM.
- Confirm the battery itself
For most coin cells, fitting a known-good fresh cell of the correct code is simpler than capacity testing.
- Still not responding?
If a correct, fresh battery installed properly does not restore the device, the fault may be elsewhere — the device may need service or replacement.