Eufy Allarm and power donw notifi

Hello guys,

I like to buy the 5-Piece Home Alarm Kit, but I’m asking myself two questions since it does not have an internal battery and in the event of a power failure at home it cannot notify me, and also does not have a GSM module which, always without power, i could not manage remotely.

Do you have any idea how to get around these problems?

I thought about sticking a “mini ups”, unfortunately I have a small house, which I have seen have these specs:
“Power Bank Smartphone Battery 8800mAh Input 100 ~ 240 VAC USB 5V DC 9V / 12V POE 15V / 24V”

How long could it last active with a basic wifi + eufy router?

Thank you all and await suggestions