Battery box holder with pin connector for two 18650 cells. Designed to accept 2 x 18650 batteries with a reliable pin connection for a compact power solution. Key features and benefits Fits two 18650 cells: Compact 2S battery box ideal for DIY power packs and applications requiring two standard lithium ion cells. Pin connector for secure connection: Ensures stable electrical contact and reduces the risk of loose connections. Weldleg design: Facilitates easy insertion of batteries and supports straightforward soldering for custom projects. Safe and simple replacement: A practical option for upgrading or replacing an old battery pack with a user friendly, straightforward setup. Cap and on/off switch: Includes a protective cap and a switch for convenient power control and safety. 23 practical use scenarios Replacing worn battery packs in portable lights or flashlights that use 2 x 18650 cells, enabling quick upgrades with minimal wiring. Building a compact, rechargeable power pack for DIY electronics, small tools, or hobby projects requiring a 2S battery configuration. Upgrading power systems in devices or kits that originally use a 2cell 18650 arrangement, providing an organized enclosure with a switch for easy operation. Notes Compatible with two 18650 cells and a pin connector. Includes a cap and an on/off switch for convenient operation.