Rechargeable Battery Nitecore 21700 6000mAh Li-ion (model NITNL2160)

The Rechargeable Battery Nitecore 21700 6000mAh Li-ion (model NITNL2160) is a high-capacity 21700-format lithium-ion cell intended for devices that accept 21700 batteries. With a nominal capacity of 6000mAh, this cell provides extended runtime for compatible flashlights, portable power banks, electric bikes, and other high-drain or long-duration applications. The cell is designed for repeated charge and discharge cycles and should be used with chargers and devices specified for 21700 Li-ion chemistry and dimensions.

Advantages

This Nitecore 21700 battery offers elevated energy density and long runtime compared with smaller cell formats, reducing the need for frequent replacements or spare cells. It is built for rechargeable use, supporting numerous cycles when charged and stored according to manufacturer guidelines. The 21700 format provides a balance between capacity and physical size, enabling compatibility with many modern portable devices that require higher power and longer operation time.

Suitable for

• High-performance flashlights and tactical lighting
• Portable power banks and external battery packs
• Electric bicycles, scooters, and personal mobility devices (compatible battery holders)
• High-drain handheld electronics and specialty equipment

Key specifications

• Cell format: 21700 lithium-ion
• Nominal capacity: 6000 mAh
• Chemistry: Li-ion (lithium-ion)
• Intended use: rechargeable secondary cell for high-capacity applications
• Typical applications: flashlights, power banks, e-mobility, high-drain electronics

How to use

Insert the battery into devices that accept 21700 cells, observing correct polarity. Charge the cell using a charger compatible with 21700 Li-ion batteries and follow the charger's instructions to avoid overcharging. Do not attempt to charge the cell in chargers not designed for lithium-ion chemistry or in chargers that exceed recommended current. Observe device manufacturer limits for maximum continuous discharge and temperature ranges during use.

Usage recommendations

Follow Nitecore's and the device manufacturer's safety and charging recommendations: use a compatible Li-ion charger, avoid mechanical damage, store cells in a cool dry place, and do not expose to high temperatures or fire. Replace the battery if it shows signs of swelling, leakage, or sustained capacity loss. For applications with high current draw, verify that the device and battery are rated to handle the required discharge rates.