This compact USB 4×18650 Power Bank Battery Box provides a simple, budget-friendly enclosure for building a portable charger. Designed to accept four 18650 cells (sold separately), the case organizes and secures batteries in a 4-slot layout with a built-in USB output interface for connecting your phone or other USB devices. Its straightforward design makes it suitable for DIY projects and battery storage needs.
The lightweight shell protects cells during transport and offers easy access for inserting and removing batteries. No circuitry or batteries are included, so assembly and any required charge/protection electronics are the responsibility of the builder. Ideal for hobbyists, technicians, or anyone looking to repurpose 18650 cells into a custom power solution.
Highlights:
– 4-slot 18650 holder for DIY power banks
– Integrated USB output port
– Lightweight protective shell
– Batteries and electronics not included


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