I am looking at the LiFePO4 32650 Rechargeable Cell: 3.2V 5000 mAh, 16Wh batteries to build at least 52v 50AH battery bank for my ebike. I could use some help with the needed BMS, shrink wrap, charger specs, and some of the math involved. By my math I only need 15 batteries and I think that is incorrect. I would appreciate a mod dropping me an email. Thanks in advance.