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To make this 21S 48v battery, here is the list of suppliers where I found the material to make it. For the BMS: 👉 Amazon Store: 👉For the BMS: https://www.amazon.fr/dp/B0DL489KJT discount code:9ZD6FXGL 👉For the Wifi module: https://www.amazon.fr/dp/B0DFTKNN6H discount code:LJTT4HLR 👉For the interface card: https://www.amazon.fr/dp/B0D2L469C6 discount code:A63YKMDM 👉Aliexpress Store: https://s.click.aliexpress.com/e/_oCN... 👉 Shopify Store: 👉For the BMS: https://bmsdaly.com/products/daly100b... 👉For accessories (Wifi module, expansion card...): https://bmsdaly.com/collections/acces... 👉 Daly official website to download programs or manuals: https://www.dalybms.com/ 👉 For the batteries, my latest ones come from this seller, allow 2 months between order and delivery: https://www.aliexpress.com/store/1103... 👉 For the battery holders: https://www.aliexpress.com/store/1103... 👉 For the connectors: https://www.aliexpress.com/store/1103... 👉 For the fuse: https://www.aliexpress.com/store/5598... 👉 For the circuit breaker https://www.aliexpress.com/store/5017... You can probably find better and cheaper. I give you these links to give you a research base 👉You can also find me on Facebook: facebook.com/profile.php?id=61558628960132 👉For those who have a large volume 3D printer like Anicubic Kobra MAX. The models I made to contain the battery, the BMS... https://www.tinkercad.com/things/iwhh... https://www.tinkercad.com/things/fQCr... https://www.tinkercad.com/things/jQ9T... https://www.tinkercad.com/things/9PrV... https://www.tinkercad.com/things/6r8K... Good luck with viewing and if you tinker with electricity, take all precautions, protect yourself, isolate yourself, a fatal accident can happen quickly... remember Claude François! :)