The iJoy 26650 is a 4200mah battery with 40A max continuous discharging current.

Manufacturer's listed Specifications:

•  Size: 26650

• Type: Li-Ni (High Drain)

• Rated Capacity: 4200mAh

• Nominal Voltage: 3.7V

• Peak Voltage: 4.2V

• Cut-off Voltage: 2.5V

• Dimensions: 26.22mm (Diameter) x 65.11mm (Length)

• Rechargeable: Yes

• Max Continuous Discharging Current: 40A

• Style: Flat Top

• Color: Black and Gold