18650 and 26650 battery connector
thingiverse
a magnetic battery connector for Li-Ion 18650 and 26650 battery, works well parts list: Plating Copper Welding Screws M4x20 15 x 5 mm hole 4 mm N35 super permanent round countersunk head M4 nuts +wire (wrapped around and soldered) I printed mine model 18650 with a 102% scale for the best fit (depends on the printer precision and material used), 26650 with 103%
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