MN21 MN27 Battery Holder
thingiverse
I resized a popular 12V Battery Holder design to fit my MN21 by tweaking its dimensions, adapting it from the AAA model.\nThe STL file works with both ABS and PLA materials - ABS is preferable for elasticity, I settled on PLA nonetheless.\nFirst attempt was slightly undersized, so I edited the STL to ensure proper fit.\nWhen printing with PLA, but your holder still falls short in size, a solution involves submerging the top section (housing spring) in acetone vapor for 60 seconds, adding some needed elasticity. If this adjustment fails to prevent battery wobbling, try swapping out your connecting wire diameter on both ends and retry.
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