2CR5 battery adapter
thingiverse
2CR5 lithium battery replacement adapter for film cameras (for example Canon EOS 3, 5, 50). Designed for 17340 LiFePO4 3.2V rechargeable batteries or CR123 lithium batteries. 5mm wide contact strips: https://www.aliexpress.com/item/Pure-Nickel-Strip-Tape-For-Li-18650-Battery-Spot-Welding-Compatible-For-Spot-Welder-Machine/32959711987.html or https://www.aliexpress.com/item/1M-Battery-Pack-DIY-Nickel-Plated-Nickel-Plated-Steel-Strip-18650-Battery-Connected-Nickel-Plate-Wide/32858796983.html Still work in progress project.
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