Rechargeable 18650 Lithium Battery 3.7V 5000mAh for Torches and DIY Electronics

This 18650 lithium battery delivers a consistent 3.7V output with a nominal capacity of 5000mAh, making it a practical choice for powering high-drain devices such as torches, portable fans, and custom battery packs. With a lightweight design at just 36g, these cells are easy to handle and fit into standard 18650 battery holders. The battery supports a charging voltage of 4.20V ±0.05V and a maximum charging voltage of 4.25V, with a discharge cut-off at 3.0V to protect the cell from deep discharge. Suitable for repeated recharging, this cell is built for applications where reliable power is needed.

Features and Construction

This battery is constructed with standard lithium-ion chemistry, providing a balance of capacity and safety within its specified operating limits. The cell is available in two physical configurations to suit different device requirements.

Material and Build

The battery uses lithium-ion cells with a nominal capacity of 5000mAh and a rated voltage of 3.7V. It weighs 36g, ensuring minimal added weight in portable setups. The casing is designed to standard 18650 dimensions for broad compatibility.

Size and Practical Fit

The 18650 cell measures 18mm in diameter with a length of either 66.5mm for the pointed head style or 65mm for the flat head style. This allows it to fit most standard battery compartments and holders designed for 18650 cells.

Uses and Placement

This rechargeable lithium battery is suited for a variety of electronic devices that require a steady 3.7V supply. It is commonly used in flashlights, portable power banks, and hobby electronics due to its capacity and reusability.

High-Drain Device Use

Thanks to its 5000mAh capacity, the battery provides extended runtime for high-drain equipment like high-lumen torches or portable vacuum cleaners. The 3.7V output ensures compatibility with many consumer electronics.

DIY and Custom Projects

For hobbyists building custom battery packs, this cell can be combined with others in series or parallel setups, provided the charging and discharging limits are observed. The flat head variant offers easier contact with spring terminals.

Benefits and Buying Value

This battery offers a cost-effective and rechargeable alternative to single-use cells, reducing waste over time. Its clear specifications help users match it to their device requirements without guesswork.

Reuse and Low Maintenance

As a rechargeable cell, it can be cycled multiple times, lowering long-term battery costs. Regular charging within the specified voltage limits helps maintain performance and lifespan.

Why Choose This Product

With a high nominal capacity of 5000mAh and standard 18650 sizing, this battery fits a wide range of devices. The choice between pointed and flat head styles provides flexibility for different battery compartment designs.