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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:
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!
