18650 7S3P rack
thingiverse
I'm building these batteries for my Li-Ion powerwall, and they're working fantastically with this BMS. Check out the 3S 25A 12V BMS on eBay at https://www.ebay.com/itm/3S-25A-12V-BMS-18650-Li-ion-Lithium-Battery-Lipo-Charging-Protection-Board-TE910/312123044794?hash=item48abfbb3ba:g:TTkAAOSwkRha6P~l.
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