Aquacraft NiMH 3/3 7.2V 1100MAh RR2 Mini Rio FEATURES: Six cells shrink wrapped with wire lead and Tamiya style connector preinstalled INCLUDES: One 7.2V 1100mAh NiMH Battery for the Reef Racer 2 REQUIRES: Charging for 30 minutes and installing in boat If charger is needed use, AQUP9929