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