Description
Dominate high-drain lighting needs with the Sofirn 21700 4000mAh pointed rechargeable lithium-ion battery – a robust button-top cell crafted for maximum power and reliability in demanding flashlights. Offering a nominal capacity of 4000mAh (minimum 3900–4000mAh) at 3.7V (working range up to 4.2V), this battery supports a strong 40A maximum continuous discharge current, delivering consistent high output for ultra-bright, sustained beams.
The pointed (button-top) design provides secure, reliable contact in flashlights and devices that require this top style, making it a seamless fit or upgrade for high-performance torches. With high energy density, fast charge capability, and a durable build, it ensures long-term performance even under intense use.
Core specifications and advantages:
- Capacity: 4000mAh (minimum 3900–4000mAh)
- Nominal voltage: 3.7V (up to 4.2V max)
- Maximum continuous discharge current: 40A (high-drain capable)
- Discharge rate: Max 5C for handling heavy loads
- Cycle life: Up to 1000 times for exceptional longevity
- Dimensions: Diameter 18.30 mm, Length 65.20 mm
- Weight: 69 g (product), approx. 150 g gross package weight
- Intelligent battery pack with environmentally friendly chemistry
- High power density and fast charge support
- Certifications: CE, RoHS, FCC
Perfect for tactical flashlights, search and rescue lights, or any high-lumen setup that demands both solid runtime and extreme current delivery. This high-current 21700 cell combines good capacity with massive discharge power, giving you brighter, longer-lasting illumination without compromise.
Important safety and usage notes: Always charge with a compatible lithium-ion charger designed for high-drain 21700 cells. Avoid exceeding discharge limits, overcharging, short-circuiting, puncturing, crushing, or exposing to water, extreme temperatures, or fire. Use in devices with suitable protection circuits for high-current operation. Store partially charged in a cool, dry place. To optimize cycle life, prevent full deep discharges and follow proper charging protocols.
Choose the Sofirn 21700 4000mAh pointed for high-drain excellence – balanced capacity, powerful output, and trusted Sofirn durability!
