I throw together a quick 4P 10S ebike battery for my wife's ebike.
Link to Spot Welder. They sell out so i have provided multiple links!
https://www.banggood.com/custlink/DmmYOtE5yd
https://www.banggood.com/custlink/GmDdLVhtEc
https://s.click.aliexpress.com/e/_AcpEUf
https://s.click.aliexpress.com/e/_AOvbd5
https://s.click.aliexpress.com/e/_AphP7t
Link to 80C battery
https://amzn.to/3cOIADl
Link to 75C battery on Banggood
https://www.banggood.com/custlink/3G3yLcSeH3