EFEST 4000 Rechargeable Battery 10A with Protective Case [Pack of 2]

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.