I got my Bionx kit about a month ago and really like it and have over 500 miles on it. The problem is I can only get about 35 miles with pedal assist with the stock 36V 8ah battery because of my weight and the hills around here and I would like to get about 60 miles. I am thinking about buying the 36 volt 8ah triangle battery and bag from Ebikes. The Bionx battery is on a rear rack. Can I parallel the second battery with the Bionx battery and how would I do it or just switch over to the other battery when the first one goes dead. Does anyone make a switch to use when one battery goes dead? Does anyone have some ideas about how to hookup the second battery? Thanks in advance.