Single 18650 Battery Holder

Build removable lithium-ion power into your project with this Single 18650 Battery Holder, a practical 1S battery socket for one standard 18650 rechargeable Li-ion cell. The holder keeps the cylindrical cell aligned and pressed against spring-loaded contacts, allowing the battery to be inserted and removed easily during charging, maintenance or replacement. It is suitable for 3.7V nominal battery-powered circuits where the battery itself, charger module and protection circuit are selected separately as per the project requirement. This 18650 holder is useful for prototyping as well as finished enclosures. It can be PCB mounted using its solder terminals or fixed inside a plastic/metal enclosure, depending on the mechanical design. Positive and negative connection markings help reduce wiring mistakes during assembly. The spring contact design compensates for small length variations between flat-top and many button-top 18650 cells, while maintaining contact pressure for stable power delivery in low to moderate current applications. Typical projects include Arduino and ESP32 portable devices, small robots, LED lighting experiments, Bluetooth speaker repairs, power-bank style DIY builds, sensor nodes and handheld test equipment. Pair it with a suitable TP4056 charging module, BMS/protection board, boost converter or buck converter according to your voltage and safety requirements. Please ensure correct cell polarity, never short-circuit the terminals, and use good-quality protected or externally protected 18650 cells for safe operation. Package includes one single-cell 18650 battery holder. Battery is not included. Pin/terminal notes: the holder provides two electrical connections, positive (+) and negative (-), which connect directly to the inserted cell terminals.