CELLS: 4500 CELLS 1.19V+ INTERNAL RESISTANCE: <=5 Mili Ohm DISCHARGE RATE: 40 amps SELECT CONNECTOR IN CHECKOUT: Tamiya, Deans Ultra, Traxxas TRX and Sermos available. WEIGHT: 18oz. NOTE: Compatable with # with Traxxas XL5 speed controller up to a 12 turn motor or XL1 speed controller up to a 17 turn motor. WEIGHT: 17oz.