Wyze Lock Batteries Low


My first post here. I got Wyze lock and keypad and it’s great!

I have it in my rental house for a few months but now I see the red icon indicating the lock battery is going bad. Considering it’s hard to get into the house, can anyone tell me how long I have once the red battery (on the left) appears? I read that there is a backup, but I don’t know the backup source or how long it will last. My house is rented week to week and I’m a few hours away. I’m wondering how much time I have.

Thank you!