Description
The Soshine 21700 3.7V 4000mAh 20A Battery delivers a 4000mAh capacity and 20A discharge rate, ideal for high-drain devices like flashlights or vaping mods. Its unprotected design suits advanced users.
High Capacity and Performance
This battery offers a true 4000mAh capacity and 3.7V nominal voltage, with a 20A discharge rate. It provides stable output for high-drain applications like vaping or flashlights. Its low internal resistance of 15-16mΩ ensures efficiency, making it a reliable choice for demanding tasks, though it requires careful handling due to its unprotected nature.
Unprotected Design for Advanced Users
The Soshine 21700 3.7V 4000mAh 20A Battery is unprotected, lacking a built-in PCB, suitable for devices with external battery management systems. It supports up to 3C discharge and should not be charged above 4.25V to avoid reducing its lifespan. It is rated for 500+ charge cycles, retaining 75-80% capacity after 500 cycles.
Compact and Versatile Use
This battery measures 21.5mm x 70.5mm and weighs 71g, making it compact for various devices. It is ideal for flashlights, vaping mods, or electric tools. Its cylindrical design fits standard 21700-compatible devices. Proper storage at 30-50% capacity is recommended.
Key Features and Specs
- Type: Cylindrical Li-ion Battery (Unprotected)
- Size: 21700
- Nominal Voltage: 3.7V
- Maximum Voltage: 4.2V
- Capacity: 4000mAh (Minimum: 3900mAh)
- Discharge Rate: 20A (Max 3C)
- Internal Resistance: 15-16mΩ
- Dimensions: 21.5mm x 70.5mm
- Weight: 71g
- Warranty: 1 Year
What’s Included
The package includes the Soshine 21700 3.7V 4000mAh 20A Battery in a color box. A 1-year warranty ensures reliability.
