Samsung 40T 21700 4000mAh 30A Rechargeable Battery

Official specifications:

Rated discharge capacity: 3900mAh

Standard discharge capacity: 4000mAh

Nominal voltage: 3.6V

Standard charge: CCCV, 2A, 4.20V, 200mA cut-off

Rated charge: CCCV, 6A, 4.20V, 100mA cut-off

Max. continuous discharge: 35A with temperature cut.

Max. continuous discharge: 45A with 80°C temperature cut.

Discharge cut-off voltage: 2.5V

Cycle life: 250 cycles to 60% at 6A charge and 35A discharge.