HIGHER CAPACITY (LONGER LIFE) Ni-MH 9.6 volt 1650mAh rechargeable battery (made with HR-AAU cells), TYCO-style, with TAMIYA connector. Dimensions: 4” long, 2.4” across, 0.6” thick. Charges up with supplied charger for 9.6v, OR with our SPEED CHARGER (sold separately)