cort

Thank you, thank you, thank you to each of you.

Thanks so much for your thoughts on this. You clearly have spent some time considering and researching your answers, and I appreciate that. Is there any reason that I could not use my car battery to recharge the batteries and save the cost of the power supply units? Also, a friend offered to let me use the batteries from his son's 24V bike as a backup set this coming weekend. Do you see any problems with running them in my son's 36V bike?

Thanks. Would I need four 6S chargers for two 10S batteries, then?

One more thing: What charger will I need for 10S batteries? Thanks!

Thanks for that info. Yes, it's the 36V. So, would I hook up two pair of 6S/3S in series, then connect those together in parallel?!

I have looked at Hobby King and cannot find any 8S or 10S batteries for less than $111. Am I missing something here?