The APC RBC17 is a UPS system that requires a 12V 9Ah AGM replacement battery. The compatible Universal Power Group replacement is the UPG UB1290 12V 9AH F2 AGM Battery (UB1290), a 12V 9Ah AGM sealed lead-acid battery. This battery delivers up to 108 watts of standby power. It weighs 5.17 lb, uses F2 terminals, measures 5.94 L x 3.78 H in, and has right polarity. This is a direct drop-in replacement for the APC RBC17 requiring no modification to the device.
