2 Slots 8800mAh 18650 Batteries 3.7V + ChargerFeatures:Batteries NOT INCLUDEDWhen the green light is on, the output is in the normal standby state, and it is red when charging. When the voltage of the rechargeable battery reaches about 4.1v, the red light turns green. At this time, the charger does not completely stop charging, but continues to charge with a small drop of current. The highest cutting voltage is 4.21v. The charger has perfect over-current and short-circuit protection functions. After being fully charged, there is no need to power off immediately, and it will not be overloaded. The materials are solid, the 13001 (0.5a) three-pole low-grade power supply is discarded, and the 13003 (1.5a) three-pole is used directly. Charging method: constant current and constant voltage. This charger has short-circuit, over-current and over