The Quickie Mobility Z-Bop is a Mobility system that requires a 12V 32Ah GEL replacement battery. The compatible Universal Power Group replacement is the UPG UB-U1 12V 32AH L1 GEL Battery Group U1 (UB-U1), a 12V 32Ah GEL sealed lead-acid battery. It uses L1 terminals. This is a direct drop-in replacement for the Quickie Mobility Z-Bop requiring no modification to the device.