Universal Battery Clamp for USB Charging
myminifactory
Two halves of a clamp designed to sandwich batteries into a completed circuit; wired to a USB boost converter that charges USB electronics. Print the two halves, and glue aluminum foil to the inner face of each half. Attach the positive and negative wires to each half respectively; either holding in place with an M3 bolt & nut, or just taping the wire in place. Solder/clamp the other ends to a USB boost converter that upscales lower voltages to 5V USB You can print this in PLA, and it will be fine--just don't let it bake in the sun or let it get too hot
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