18650 2200mAh 3.7V Li-ion.

A 18650 battery is a lithium-ion battery. The name derives from the battery's specific measurements: 18mm x 65mm. For scale, that's larger than an AA battery. The 18650 battery has a voltage of 3.7v and has between 2100mAh and 2200mAh.

18650 Li-on battery industrial rechargeable - 2200mAh spec:

Battery size:18650
Voltage:3.7v
Standard Capacity:2200mah
Minimum Capacity:2100mah
Rechargeable: Yes
Type: Li-ion
Size:65mm x 18.25mm
Weight:41g
Quantity:1pcs