18650 3.7volts Lithium Battery

These are 18650 lithium-ion rechargeable batteries with a nominal voltage of 3.7V.The markings indicate capacities ranging from 3000mAh to 9000mAh; however, the practical maximum capacity for a commercially available 18650 cell is generally around 3600mAh, suggesting high-capacity claims on labels may be inaccurate.Such batteries are commonly used in devices like LED flashlights, power banks, and electronic projects.