good morning Thierry, I bought the Arlo in January 2023, I charged it and installed it outside the house under a roof, always on and detects movement with recording, now it's been 3 and a half months and I'm at 16% charge with an intermediate recharge.

Hello Thierry
The battery is good for 2-3 months.
I bought a solar panel from Arlo. Now I never have to charge the cam. Been in continuous operation for over 1 year.