2-Cell 18650 Lithium Battery Holder, 3.7V

An 18650 cell on its own is just a bare cylindrical battery with no convenient way to connect it into a circuit - a battery holder solves that directly, with spring-loaded contacts that grip each cell securely while providing simple solder-tab or wire connection points for building the cell into an actual working power supply.

This version holds two 18650 cells side by side, giving a project a convenient way to use a 2-cell battery configuration without needing custom spot-welded battery packs or soldering directly onto bare cell terminals (a genuinely risky practice with lithium cells if done carelessly). The holder's spring contacts apply consistent pressure to maintain reliable electrical connection even through moderate vibration or handling, while still allowing cells to be easily swapped out when they reach end of life.

Construction uses durable plastic housing that both protects the cells from accidental short-circuit contact with other components in a project enclosure and gives a secure physical mounting point that can be screwed or glued into place, rather than leaving loose cells rattling around inside a project.

Builders designing a custom battery pack around standard 18650 cells, prototyping a new battery-powered project before committing to a soldered or spot-welded pack design, or needing a simple, serviceable way to hold and connect two 18650 cells will find this holder a practical, inexpensive foundation for that battery integration.