The Safe 400A is a UPS system that requires a 6V 8.5Ah AGM replacement battery. The compatible Universal Power Group replacement is the UPG UB685 6V 8.5AH F1 AGM Battery (UB685), a 6V 8.5Ah AGM sealed lead-acid battery. This battery delivers up to 51 watts of standby power. It weighs 3.3 lb, uses F1 terminals, measures 3.9 L x 4.65 H in, and has left polarity. This is a direct drop-in replacement for the Safe 400A requiring no modification to the device.
