24 Volt Lithium Ion Battery Pack "RTMB" (Rack TOP Mount Battery Pack) for EZIP Via Rapido, EZIP Eco-Ride EZIP 24 Volt 10 Amp Lithium Ion RTMB (Rack TOP Mount Battery Pack) OEM Battery on the Ezip Via Rapido Electric Bike & The Ezip Eco-Ride by Currie. Locking Plug and Play Battery RTMB (Rack Top Mount Battery), 24V/10AH Pack This Li-Ion pack can be used as a replacement for your bike, or to extened ride times.