DIY 72v 20AH Battery Build

This was quite the project for me. I built a 72V 20AH battery from used batteries that I had to disassemble and balance myself then rebuild to make a large 72v battery protected with a BMS for a 5000w E-bike build I'm working on. I had a lot of hiccups along the way: My spot welder died, packages got lost in the mail, I got a bunch of parts from Ebay and Ali-express that were not as described. I also learned that nickel plated steel is often used when you have 2p,3p and 4p rolls, even if the seller lists it as something else. Thanks for watching! Relevant links: 20s lithium battery charger (72v nominal 84v max): https://amzn.to/4apvrf2 Cycle Satiator I purchased (for 85% and variable charging): https://amzn.to/3vXlqH2 Jumper cables for cheap(er) 8awg cable at time of filming: https://amzn.to/3VNHbUh Ebike kit: https://amzn.to/3vvs1bK BMS 72v: https://amzn.to/4cOwLKk Molecel INR 18650A cell used: https://www.batteryjunction.com/catal... Dave's YouTube Gear: GoPro Hero 11 - https://amzn.to/44tlnyL Zoom F2 field recorder - https://amzn.to/44AoHIc Desktop mic: https://amzn.to/3OGa5k7 Time Stamps: 0:00 - intro 1:54 - Size and configuration 2:47 - spot welding 3:55 - BMS 7:37 - Terminals + 9:30 - Shrink Wrap and sealing As an Amazon Associate, I earn from qualifying purchases.