18650 Lithium Battery Charging 5V 2A Dual USB Output Step-up Boost Converter Module for DIY Power Bank JX-887Y

Input port: MicroUSB
Input requirements: 5V1A or higher
Output port: 2x USB ports
Output: 5V1A/5V2A
Size : 8 X 32 X 69 mm

For 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.