CyberPower RBP0128restores life to UPS systems to keep up the system's performance. The ready-to-use battery pack allows users to replace batteries easily. The Battery Cartridge adopts leak-proof sealed lead-acid battery which is stable and safe, to ensure the power system's reliability. The battery is certified by CyberPower, guaranteeing the product's high quality and safety. Its maintenance-free design exempts user from having to refill the battery fluid.