6S3P 21700 ENT (INR21700-55ST) 16500mAh Li-ion Battery

The 6S3P 21700 ENT (INR21700-55ST) is a high-power, high-efficiency, high-capacity Li-ion battery pack designed to deliver maximum flight time, stable performance, and high current output for heavy-duty FPV drones (Long Range), cargo UAVs, RC models, and other autonomous systems. Featuring a 6S3P configuration and an impressive 16500mAh capacity, this battery provides the necessary voltage and a massive energy reserve for the most demanding long-duration missions.

Features:

Ultra-high capacity: 16500mAh ensures maximum endurance and long operating times, eliminating the need for frequent battery swaps.

6S configuration: A nominal voltage of 22.2V provides high power for the stable operation of drones and systems under heavy loads.

21700 ENT cells: High-quality INR21700-55ST Li-ion cells offer stable current output, a long cycle life, and reliable safety.

3P construction: Three parallel strings of cells ensure excellent load distribution, higher operating current, and minimal heat generation during use.

High discharge current: Supports reliable performance even under peak load conditions. Robust Construction: A durable protective casing and high-quality assembly safeguard the battery pack against mechanical damage and vibrations.

Compatibility: Ideally suited for large FPV drones (7–10+ inches), heavy-lift quadcopters, fixed-wing UAVs, and ground-based RC platforms.

Specifications:

Capacity: 16,500 mAh

Configuration: 6S3P

Nominal Voltage: 22.2 V

Maximum Voltage: 25.2 V

Cell Type: 21700 Lithium-ion cells (INR21700-55ST)

Connector Type: XT60 / XT90 / QS8 (depending on the specific configuration)

Operating Temperature: -10°C to +60°C

Storage Temperature: -20°C to +45°C

Advantages:

Maximum Endurance: Delivers exceptionally long flight times for long-range missions.

Enhanced Reliability: A triple-parallel (3P) configuration reduces the load on individual cells.

High Energy Density: 21700-format cells offer an superior capacity-to-weight ratio.

Versatility: Suitable for a wide range of heavy-duty unmanned and robotic systems.

Usage Recommendations:

Use only compatible Li-ion chargers that support cell balancing.

Avoid deep discharge below the permissible limit. Store the battery in "Storage" mode (at approximately 50–60% charge) during long periods of inactivity.

Check the condition of the wiring, power connectors, and protective casing before each use.

Package contents:

6S3P 21700 ENT (INR21700-55ST) 16500mAh Li-ion battery pack — 1 pc.