CyberPower’s CP900AVR has an easy-to-use interface with just two buttons (electricity on/off and mute) and 4 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) about the entrance of the device. Photo: Michael Hession https://bd-auto-group30295.bloggosite.com/43488869/detailed-notes-on-ups-battery-price-in-sri-lanka