Your Sirène uses a rechargeable battery.
The battery, when fully charged, usually lasts up to 60 days, depending on usage. It is estimated based on a day where you bring your Sirène every day.
Battery issues?
If you are experiencing problems with your battery, we suggest that you:
1 – Make sure you are using the right charger (the one you received with your Sirène)
2 – Make sure to fully charge it before you unplug it from the charger