This kit: WE 26" electric bicycle hub motor, motorized bike kit. - eBay (item 260227242720 end time Apr-07-08 12:26:07 PDT)
comes with three batteries. Maybe I could just use one of the batteries since I don't need it for the main engine? Is this kit similar to what you were referring to with the battery weight Deacon? And do you know if I could get a really small lithium ion battery that is 36v, to power this kit in order to save weight?