When building your own drone, model aircraft, or small outdoor power supply, connecting four 18650 cells in series is a common solution—but the batteries can rattle around and become annoying. This bracket is designed to securely hold four 18650 cells together as a compact unit, making wiring much more convenient.

The design is straightforward: each cell slot is machined to the standard outer diameter of an 18650, with space left in the center for routing wires and accommodating nickel strips/weld points. Snap‑fit tabs are added to the bottom and sides, enabling easy assembly of multiple units or integration into an enclosure.

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