CyberPower’s CP900AVR has a simple-to-use interface with just two buttons (electricity on/off and mute) and 4 indicator lights (showing when the unit is turned on, once the battery backup kicks in, when AVR is activated, and when there’s an influence overload) over the front in the device. Photograph: Michael Hession https://mixedmartialartsforkids16982.tinyblogging.com/getting-my-ups-battery-for-pc-to-work-80038596