Function: Battery holder designed to securely house four 18650 lithium-ion cells, providing stable power output for electronic and DIY projects.

Configuration: Supports 4-cell series or parallel connection (depending on wiring) to achieve desired voltage and capacity for custom battery packs.

Construction: Made from durable ABS plastic with strong spring contacts and nickel-plated terminals to ensure reliable electrical connectivity.

Output Interface: Equipped with clearly marked positive and negative terminals and pre-soldered wire leads for easy integration into circuits.

Compatibility: Suitable for powering Arduino projects, robotics, LED lighting systems, RC models, and portable electronic devices.

Safety: Features strong cell retention and proper insulation spacing to prevent short circuits and battery dislodging.

Design: Compact and lightweight housing with open-cell design for easy battery insertion and removal.

Applications: Ideal for DIY power banks, rechargeable battery packs, solar energy storage systems, and educational electronics kits.