Accomile Rocket Bear 1S Electric Mountain Bike ~ 48V 750W Bafang Mid Drive E-bike. RocketBear 1S eBike with BBS02B 48V 750W Mid Drive Motor & 17.5Ah Removable Battery. 🚴[ POWERFUL MOTOR & REMOVABLE BATTERY ] Accolmile 27.5" RocketBear 1S Electric Mountain Bike is preinstalled 8fun BBS02B 48V 750W Mid Drive Motor which has great power to climb.