Homemade Copper Magnesium Battery
$2 for 5pcs 1-4 layer PCBs ;PCBA from $0 : https://jlcpcb.com/?from=VAN
3D printing services as low as $0.07/g, 48hr build time
$2 for 5pcs 1-4 layer PCBs ;PCBA from $0 : https://jlcpcb.com/?from=VAN
3D printing services as low as $0.07/g, 48hr build time