WGP Mini UPS- Router Backup UPS is a mini-up that can protect your router and onu from thunder. It has a battery capacity of 8800mAh, which gives you up to 7 to 8 hours of backup. This mini ups also comes with a type of multi-output, so you can use it with different devices that require 5V, 9V, or 12V output. You don’t have to worry about your device not being compatible – these mini-ups will work with any device that uses one of those three voltages. Plus, the working temperature range is -20°C~65°C, so it can be used in a variety of climates.