Mini UPS Battery Backup 12V 2A Uninterruptible Power Supply for WiFi, Router Wall mounted Backup Power Adapter Drop Shipping|Uninterrupted Power Supply| - AliExpress
Amazon.com: Mini UPS Battery Backup Uninterruptible Power Supply for Router, Modem, Security Camera, Built-in 10000mAh with Input AC Output USB 5V DC 9V/12V 2A Gigabit POE 24V/48V (1000Mbps) : Electronics