Rechargeable Li-ion Battery Nitecore 21700 5500mAh 20A with USB-C (model NITNL2155HPR)

The Nitecore 21700 rechargeable Li-ion battery model NITNL2155HPR delivers a high-capacity 5500mAh cell with a continuous discharge rating of 20A and built‑in USB‑C charging. Designed for devices that require sustained high current, this 21700-format battery integrates a USB‑C port allowing direct recharge without the need for an external charger or dedicated charging station. The cell is suitable for applications where long runtime and dependable current delivery are important, and it is compatible with devices that accept standard 21700 batteries.

Advantages

This battery combines large capacity and a 20A continuous discharge capability to support high‑drain electronics while maximizing run time between charges. The integrated USB‑C charging interface simplifies recharging by enabling convenient, cable‑based top‑ups from common power sources such as USB power adapters, power banks, or USB ports. The 21700 format provides higher energy density compared with smaller cylindrical cells, making it a practical option for flashlights, portable devices, and other equipment that benefit from extended operation.

Suitable for

• High‑performance flashlights and tactical lights that accept 21700 cells
• Portable electronic devices requiring sustained current and long runtime
• Vaping devices compatible with 21700 batteries
• Power banks, DIY battery packs, and other custom power solutions using 21700 cells

Key specifications

• Cell type: Rechargeable Li‑ion, 21700 format
• Nominal capacity: 5500 mAh
• Continuous discharge current: 20 A
• Integrated charging: USB‑C port for direct charging
• Form factor: Cylindrical 21700 size for compatibility with devices that accept 21700 cells

How to use

Insert the battery into devices that are specified to accept 21700 cells, observing correct polarity. To recharge the battery, connect a USB‑C cable to the battery’s charging port and to a suitable USB power source that meets the battery’s charging requirements. Avoid charging with incompatible chargers or power sources that do not provide stable USB power. Follow the device manufacturer’s instructions for safe installation and removal of the cell.

Usage recommendations

Use the battery in equipment that explicitly supports 21700 cells and can tolerate the specified 20A continuous discharge. For prolonged storage, keep the battery at a partial charge in a cool, dry place and avoid extreme temperatures. Inspect the battery for damage before each use and replace it if the housing is compromised. Do not expose the cell to water, direct heat sources, or prolonged high current beyond the specified rating.