Rechargeable Li-ion battery Nitecore NL1840HP 3.6V 4000mAh

Nitecore NL1840HP is a rechargeable Li-ion cell rated 3.6V and 4000mAh designed to deliver sustained power to high-drain devices. The battery is intended for use in compatible flashlights and portable electronics that require a nominal voltage of 3.6 volts and a high-capacity cell for extended runtimes. The construction and chemistry prioritize rechargeability and consistent voltage output throughout discharge cycles.

Advantages

The NL1840HP offers a high 4000mAh capacity that supports longer operation between charges compared with lower-capacity cells. As a rechargeable Li-ion battery it is suitable for repeated charging cycles and provides stable voltage for devices that demand steady current. The design includes protections against common misuse scenarios and is optimized for use in high-drain applications such as flashlights.

Suitable for

• High-drain handheld flashlights and tactical lights
• Portable electronic devices that accept 3.6V Li-ion cells
• Battery replacement in compatible equipment requiring 4000mAh capacity

Key specifications

• Chemistry: Lithium-ion
• Nominal voltage: 3.6 V
• Rated capacity: 4000 mAh
• Rechargeable: yes
• Designed for high-drain applications

How to use

Insert the NL1840HP into the device according to the device manufacturer's polarity instructions. Use a charger compatible with 3.6V Li-ion cells and follow the charger's guidelines for safe charging. Do not force the cell into incompatible compartments or attempt to modify the battery. Observe device-specific recommendations for battery handling and replacement intervals.

Recommendations

Charge the battery with a suitable Li-ion charger, store it in a cool, dry place when not in use, and avoid exposure to extreme temperatures. Follow the device and charger manufacturer instructions to ensure safe operation and to maximize the service life of the NL1840HP.