Battery suddenly drained within days ?

Thanks for the answer @Chelsea_Ring
Non, there are not so many events, like i said, i’ve disable almost everything. See capture attached.
My wifi was kinda low since the very beginning, because the door/walls are pretty hefty, it hasn’t really changed since the beginning.

Since amazon return are not really an option for me (each of them cost me about 20€) i’d appreciate another solution. Especially since i dont see a reason for a battery to last 3 month on the 1st charge and then 3 days on the second.

Regards