OK thank you for the info I greatly appreciate it, I will post pics of my buildCruise speed might be 25-28 with 48- 52 volt Li ion battery and a 750 watt mid drive.
3-4 Sealed Lead acid motorcycle batteries wired in series would work, but range is severely limited and adds a bunch of weight and they are not that cheap either. so for a little more money you want a light Li ion.. SLA batteries need to put out some serious amps per hour of no less than 10ah to give any range.
Most Motorcycle batteries are like 2.5 AH if memory serves me. Car batteries work but are super heavy and not practical really/
best ask these questions to the people you are planning to buy from. Dilengers has knowledgeable people. Put it this way... if a company cannot answer basic
questions do not buy from them. Let us know when you start your project.