510 Cart Battery
cults3d
This fits 510 carts, heres the parts I used off adafruit https://www.adafruit.com/product/1119 https://www.adafruit.com/product/2750 https://www.adafruit.com/product/1904 and two M3*6mm by installing the wires in the correct place you can make a fully functional battery with basic soldering and hot glue skills.
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