The Ortho-Kinetics Lark 4300 is a Mobility system that requires a 12V 35Ah AGM replacement battery. The compatible Universal Power Group replacement is the UPG UB12350 12V 35AH L1 AGM Battery Group U1 (UB12350), a 12V 35Ah AGM sealed lead-acid battery. This battery delivers up to 420 watts of standby power. It weighs 22.5 lb, uses L1 terminals, measures 7.75 L x 6.26 H in, and has right polarity. This is a direct drop-in replacement for the Ortho-Kinetics Lark 4300 requiring no modification to the device.
