C Battery Box
thingiverse
Here is a battery box designed to hold four 'C' batteries. Durable and secure storage. I use this to keep the spare batteries I use for portable radios (an old Broadmoor multiband radio, a Longines World Traveler multiband radio, and a newer Radio Shack AM-FM-SW-Weather radio). Similar setup as my <a href="https://www.thingiverse.com/thing:3508813" target="_blank">AAA Battery Case</a> ( but is a 2x2 case, rather than a 4x1 case). Friction fit cap, with .05mm radius clearance. Slides and holds great! I printed this in PETG, but PLA would work equally well, as should whatever favorite filament you may choose.
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