LG ZIPPO High-Capacity 18650 Li-ion : 2200mAh, 3.7V with Wired Battery  (Pack of 4)

This 3.7V, 2200mAh rechargeable lithium-ion battery is designed for high-drain applications like flashlights, power banks, and portable electronics. Its high energy density provides sustained power, while its long lifespan (over 1000 charge cycles) ensures durability and reduces environmental impact. For optimal safety and performance, it's crucial to use this battery with a protective circuit board to prevent overcharging, over-discharging, and short circuits.