Onyehn 3.7V Turn 5V 2A Boost Module,Dual USB Charging Circuit Board PCB Board with Led Light for 18650 Lithium Battery Mobile Power Bank DIY (2 Pack)

Onyehn 3.7V Turn 5V 2A Boost Module,Dual USB Charging Circuit Board PCB Board with Led Light for 18650 Lithium Battery Mobile Power Bank DIY (2 Pack)

Material: Metal
color: Blue
Input port: MicroUSB (Android mouth)
Input requirements: 5V constant voltage power supply can be done to charge the input power supply
Output port: USB
Output parameters: 5V1A/5V2A

Requirements for rechargeable batteries:
Available battery: 18650 battery, cell phone battery, flat battery, MP3 battery, etc. 3.7V-4.2V polymer lithium battery, can be single section (chip) power supply, can also be multi-section (chip) parallel power supply (not apply tandem). (Note: increase the capacity in parallel, the series is to increase the voltage, can only be used in parallel!)
Not available Battery: dry batteries, batteries, 1.2V rechargeable batteries, nickel-metal hydride batteries, 3.2V lithium iron polymer lithium batteries.

Product installation should pay attention to the following points:
The battery should be in parallel, the voltage between 3.2-4.2V to work, 18650 flat and polymer batteries can be;
Battery positive connected board B, battery negative connected board B-. It cannot be reversed, once connected reversed, the main board will be burned. the old and new batteries, models, inconsistent battery brand can not be mixed.

Package Include:
2* Circuit Board