Charging module for 1A Lithium batteries with 18650 battery protection and 2A 5V discharge module 10 pieces TP4056 charging module MICRO USB female input  Maximum charge current: 1000 mA Charge cut-off voltage: 4.2 V ± 1% Input voltage: 5 V  Battery overcharge protection voltage: 2.5 V Battery overcurrent protection current: 3 A Connect the battery to B + B-  inserted into the female USB charger of the mobile phone the red light is charging, the green light at maximum.  Integrated 2A 5V drain module 4 in 1 charging / discharging / lithium battery protection / battery level indicator module. Lithium battery protection function: over current, over voltage, over temperature, short circuit protection. The first time you connect the load, the output turns on automatically. If the load is less than 50MA, the output will be automatically deactivated after 30 seconds; if the load is greater than 50MA, the output will be automatically activated.