Rechargeable Battery Nitecore NL2155HP 21700 Li-ion 5500mAh

Nitecore NL2155HP is a rechargeable 21700 Li‑ion battery with 5500mAh capacity engineered for high‑capacity portable devices. As a 21700 format cell, it offers extended runtime compared with smaller cylindrical cells and is intended for applications that require sustained current output and reliable energy storage. The cell is compatible with chargers and devices that accept 21700 Li‑ion batteries and is suitable for use in flashlights, power banks, high‑drain electronics and custom battery packs.

Advantages

The NL2155HP provides a high nominal capacity of 5500mAh in the 21700 form factor, delivering longer operating time between charges. The Li‑ion chemistry ensures a favorable energy density for compact devices while maintaining a balance between capacity and discharge performance. As a rechargeable cell, it reduces the need for single‑use batteries and supports repeated charge cycles when used with appropriate 21700-compatible charging equipment.

Suitable for

• High‑output LED flashlights and illumination tools
• Portable power banks and single‑cell power solutions
• High‑drain electronic devices such as compact audio equipment or handheld tools
• DIY battery packs and custom power solutions using 21700 cells

Key specifications

• Cell type: rechargeable Li‑ion cylindrical cell (21700 format)
• Nominal capacity: 5500mAh
• Form factor: 21700 (diameter and length matching standard 21700 dimensions)
• Typical applications: high‑capacity portable devices and high‑drain electronics

How to use

Use the NL2155HP with chargers and devices explicitly designed for 21700 Li‑ion cells and follow the charger manufacturer’s instructions for proper charging current and termination. Insert the cell with correct polarity into the device or charger, monitor charging progress as recommended by the charger, and avoid charging unattended for extended periods. For new packs or DIY assemblies, ensure cells are matched by state of charge and capacity and installed with appropriate protection circuits to prevent overcharge, overdischarge and short circuits.

Usage recommendations

Store and transport cells at moderate charge levels (around 30–50%) for longer shelf life, keep them away from extreme temperatures, and use a charger that supports Li‑ion chemistry and 21700 dimensions. Replace cells that show signs of physical damage, leakage, swelling or abnormal heating.