Description

Product Description:

The 21700 5000mAh Lithium-ion Rechargeable Battery Cell is a high-capacity cylindrical cell designed for battery pack manufacturing, energy storage systems, power tools, backup power, and other high-performance applications. With a nominal voltage of 3.6V, high energy density, and stable discharge performance up to 3C, it delivers reliable power and long service life. The cell is engineered for consistent performance, low internal resistance, and excellent temperature adaptability, making it suitable for both professional and DIY battery pack assembly.

Key Features:

• High Capacity 5000mAh (Typical)
• 3.6V Nominal Voltage
• High Energy Output – 18.0Wh (Typical)
• Supports Continuous Discharge up to 3C
• Low Internal Resistance (≤25mΩ)
• Stable Performance & High Energy Density
• Wide Operating Temperature Range
• Suitable for Custom Battery Pack Assembly
• Long Cycle Performance (80% capacity retention after 801 cycles under specified test conditions)

Technical Specifications:

• Cell Type: Cylindrical Lithium-ion Rechargeable Cell
• Nominal Voltage: 3.6V
• Typical Capacity: 5000mAh
• Rated Capacity: 4900mAh
• Typical Energy: 18.0Wh
• Rated Energy: 17.64Wh
• Maximum Charging Voltage: 4.20V
• Discharge Cut-off Voltage: 2.0V
• End of Discharge Voltage: 2.5V
• Standard Charge Current: 0.5C (2450mA)
• Standard Discharge Current: 0.2C (980mA)
• Maximum Charge Current: 1C (4900mA)
• Maximum Continuous Discharge Current: 3C (14700mA)
• Internal Resistance: ≤25mΩ
• Operating Temperature:
• Charge: 0°C to 45°C
• Discharge: -20°C to 60°C
• Storage Temperature:
• 1 Year: -20°C to 25°C
• 3 Months: -20°C to 45°C
• 1 Month: -20°C to 60°C
• Dimensions: Ø21.4 × 70.75mm
• Weight: ≤70g

Applications:

• Battery Pack Manufacturing
• Solar Energy Storage Systems
• Home Energy Storage
• UPS Backup Systems
• Portable Power Stations
• Power Tools
• Electric Mobility Projects
• DIY Battery Packs
• Industrial Equipment

Safety Instructions:

• Use only a compatible lithium-ion charger (4.20V).
• Do not short-circuit, puncture, crush, or disassemble the cell.
• Do not expose the battery to fire, water, or excessive heat.
• Avoid charging above 4.20V or discharging below 2.0V.
• For battery pack assembly, use nickel strips with spot welding. Do not solder directly to the battery terminals, as excessive heat may damage the cell.
• Always use a suitable Battery Management System (BMS) when building battery packs.
• Store in a cool, dry place away from direct sunlight and moisture.

Package Includes:
1 × 21700 3.6V 5000mAh Lithium-ion Rechargeable Battery Cell