Berserker Cycle Design, has improved its product offering with the addition of a Rear Rack Battery pack option with the Bionx Electric Assist.  Not only do you get the full benefit of the 350W continuous, 600W Peak electric assist, but you also, have an integrated rear tail light and a 12VDC power outlet for your GPS or other power hungry electric device.   The sleak Silver Bionx Rear Rack Battery Pack offers Quick Charging, and Easy Removal, while leaving you access to all of the tie down locations on our Heavy Duty Rear Rack.