18650 Battery holder/tray

thingiverse

I built a 24volt Li ion battery holder for my son's Razor scooter. I made it replace the Lead Acid batteries by building a 4x6 tray, copying the stackable design found online. The hole size is 19mm, which accommodates the 18.5mm diameter of the Li-ion battery. I tried different sizes and 19mm worked best. Print the holder with the tabs facing up to ensure Makerbot supports are small and easily removed. You can make a tray of any size by copying and pasting the single holder in Autodesk 123D. The tabs protect the wiring and prevent the battery from pushing through. I connected a 6s4p Li-ion battery pack with a protection board purchased on Ebay. The scooter needed overvolted Razor batteries to achieve 36volts, but it works perfectly fine. My 11-year-old son can now ride it at full speed because even heavy adults can do so easily due to this upgrade that allowed the 130-pound weight limit of most standard scooters. Note: Update included - my E200 razor is modified to MY1016 250watt brushed motor with 1000W controller purchased on Yiyun, using 10s4p battery packs which output at maximum charge level (42V) allowing faster speeds for a rider who weighs within safety range limits despite my large adult weight.