EFEST 4000 Rechargeable Battery 10A with Protective Case [Pack of 2] Extended Capacity, Versatile Compatibility, Highly Stable for Flashlights & LED Devices, Portable Power Banks

Efest 4000mAh 10A Rechargeable Battery (2-Pack) – High-Capacity Power for Every DayPower your daily electronics with the ultimate high-capacity solution. The Efest 4000mAh 10A Battery delivers exceptional, long-lasting performance for devices that demand extended runtimes without heavy power draws. Engineered with a massive 4000mAh capacity, this premium lithium-ion cell ensures your essential devices stay powered hours longer than standard rechargeable options, reducing the need for constant recharging.Unmatched Runtime for Low-to-Medium Drain DevicesWith a reliable 10A Continuous Discharge Rating (CDR) and a nominal voltage of 3.7V, this battery is optimized for efficiency. It is the perfect power source for high-efficiency LED flashlights, professional headlamps, laser pointers, wireless doorbells, handheld personal fans, and custom DIY battery packs. Enjoy steady, unwavering voltage output from the first minute of use until the very last.Built with Safety and Quality in MindSafety is our top priority. Efest batteries are manufactured under strict quality control standards, featuring built-in protections against overcharging, over-discharging, and short circuits. The flat-top design ensures seamless compatibility and a secure fit in standard battery compartments and chargers.Important Safety Notice:This is a low-drain (10A max) battery cell. It is NOT designed or intended for use in high-wattage e-cigarettes, vape mods, or sub-ohm vaporizers. Forcing this battery beyond its 10A rating can cause overheating and damage. Always verify your device’s exact amperage requirements before purchasing.

• MASSIVE 4000 CAPACITY: Engineered to deliver maximum runtime and long-lasting energy, keeping your essential devices powered hours longer than standard cells.
• OPTIMIZED 10A PERFORMANCE: Features a reliable 10A Continuous Discharge Rating (CDR) and steady 3.7V nominal voltage for efficient, stable power delivery.
• VERSATILE DEVICE COMPATIBILITY: Perfect power source for high-efficiency LED flashlights, headlamps, handheld personal fans, laser pointers, and custom DIY battery packs.
• SAFETY-FIRST ENGINEERING: Built with strict quality control standards and advanced internal protections to effectively safeguard against overcharging, over-discharging, and short-circuiting.
• NOT FOR VAPING OR MODS: Low-drain cell designed strictly for standard everyday electronics. NOT safe for use in high-wattage e-cigarettes, vaporizers, or sub-ohm devices.