Power Bank Circuit 3 USB 5V 2A 1A Lithium Li-ion 18650 Battery Charging Board LED Indicator

Description* 3 USB output, automatically recognize the output 5V 1A or 2A on the phone. You can charge 3 mobile phone at the same time.* Applicable to 3.7-4.2V rechargeable lithium battery, such as cell phone battery, tablet battery, 18650 battery and so on.*Can be connected to a lithium battery, and can also be connected in multiple sections of lithium.* Lithium positive be connected to B+ and lithium negative to B-.* overcharging protection, over discharging protection, overload protection.