The SunL City Boy is a Mobility system that requires a 12V 7Ah AGM replacement battery. The compatible Universal Power Group replacement is the UPG UB1270 12V 7AH F1 AGM Battery (UB1270), a 12V 7Ah AGM sealed lead-acid battery. This battery delivers up to 84 watts of standby power. It weighs 4.52 lb, uses F1 terminals, measures 5.94 L x 3.7 H in, and has left polarity. This is a direct drop-in replacement for the SunL City Boy requiring no modification to the device.
