CyberPower’s CP900AVR has a straightforward-to-use interface with just two buttons (ability on/off and mute) and four indicator lights (showing once the device is turned on, once the battery backup kicks in, when AVR is activated, and when there’s a power overload) to the entrance in the unit. Image: Michael Hession https://alexisg7ron.ampblogs.com/5-tips-about-ups-battery-for-pc-you-can-use-today-73016558