CyberPower’s CP900AVR has a simple-to-use interface with just two buttons (power on/off and mute) and four indicator lights (displaying once the unit is turned on, once the battery backup kicks in, when AVR is activated, and when there’s a power overload) over the front on the device. Picture: Michael Hession https://mixed-martial-arts61592.articlesblogger.com/58675575/details-fiction-and-battery-ups-syndome