18650 Cylindrical Batteries are widely used in various applications including:

High-End Flashlights
Laptop Battery Cell Replacements
Customized Battery Pack Solutions

18650-2200mAh 3.7V 2200mAh datasheet
Nominal capacity 2600mAh
Typical Capacity 2600mAh
Cell Type 18650 3.7V 2200mAh
Continuous discharge current: 2A
Max discharge current: 3A
Charge current Max continuous: 2A
Over discharge cut off voltage 4.8±0.2V
Over charge cut off voltage 12.75±0.1V
Over current Max 3A
Impedance: below 80mΩ
Weight: below 150g