From daily gadgets to pro photography gear, we all rely on AA, AAA, and coin batteries. Standard storage cases usually force you into one size, and tossing them together risks short circuits, dents, or leaks.
Enter MakerWorld's innovative 3D printed modular battery case. Printed in one piece using white PETG on a Bambu Lab H2S printer with zero assembly required, this case packs dedicated slots for AA, AAA, CR2016, CR2025, CR2032, and LR44 batteries. Complete with a two-stage self-locking latch and a flexible hinge, it entirely eliminates short-circuit and wear risks while offering DIYers top-tier portability and protection.
The case shines when it comes to layout and space efficiency. Sporting a sleek, rounded cube shape, it features a secure two-stage locking mechanism on the front with dual elastic positioning. The flexible hinge is made up of over a dozen individually printed segments—surviving repeated open/close tests without popping open in your bag.
Inside, the storage is split perfectly. The top tier neatly stows 12 AA and 8 AAA batteries, maximizing every millimeter.
The bottom tier features two open rectangular bins that house six different modular yellow dividers designed specifically to organize tiny coin cells so they stay put and don't tangle. Plus, the lid has designated space for a shock-absorbing sponge pad to silence rattling on the move, ensuring both the shells and terminals stay pristine.
Measuring roughly 101.44mm x 78.11mm x 57.30mm, this ultra-compact 3D printed case fits perfectly in one hand—a dream for photographers, repair techs, and tech gearheads on the go.
Thanks to precision modeling and clever modular inserts, it handles AA and the entire coin battery family with ease, overcoming the compatibility issues of legacy storage options at a fraction of the cost. As 3D printing and open-source hardware continue to boom, custom storage solutions boasting this level of adaptability and pro-level defense will continue to drive the evolution of digital accessories.
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