18650 Dual Micro USB 3.7V – 5V 2A Boost Mobile Power Bank DIY 18650 Lithium Battery Charger PCB Board Step Up modul LED-del
18650 Dual Micro USB 3.7V to 5V 2A Boost Mobile Power Bank DIY 18650 Lithium Battery Charger PCB Board Step Up Module With Led
100% high quality and branded 18650 Dual Micro USB 3.7V to 5V 2A Boost Mobile Power Bank DIY 
18650 Lithium li-ion battery dual micro usb booster board feature
LED lights show the power, non-working state of intelligent automatic shutdown;
Dual USB output. 
Built-in lithium battery protection IC, over-current, overvoltage, undervoltage protection;
18650 Lithium li-ion battery dual micro usb booster board parameter
Input port: MicroUSB (Andrews mouth)
Input requirements: 5V constant voltage power supply can be done to charge the input power supply, the most matching charger for 5V1A above
Output port: USB
Output parameters: 5V1A/5V2A 
Size : 8 X 32 X 69 mm (H*W*L)
18650 Lithium li-ion battery dual micro usb booster board 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 in series, not in series ). (Note: increase the capacity in parallel, the series is to increase the voltage, can only be used in parallel!)
Can be parallel 2-6 18650 battery.
Not available Battery: dry batteries, batteries, 1.2V rechargeable batteries, nickel-metal hydride batteries, 3.2V lithium iron polymer lithium batteries.
18650 Lithium li-ion battery dual micro usb booster board installation should pay attention to the following point
the battery should be in parallel, the voltage between 3.2-4.2V to work, 18650 flat and polymer batteries can be;
the battery is connected to the motherboard B negative access B-, installed anti-burning motherboard;
the old and new batteries, models, inconsistent battery brand can not be mixed.
1005001736584003. - miyu