Power Bank Module With Dual USB 5V 2A

From the shop's description

Dual Micro USB 3.7V to 5V 2A Boost Mobile Power Bank DIY 18650 Lithium Battery Charger Features LED lights show the power, non-working state of intelligent automatic shutdown; Dual USB output. Built-in lithium battery protection IC, over-current, over-voltage, under-voltage protection. 18650 Lithium li-ion battery dual micro usb booster board parameter. Input port: MicroUSB. Input requirements: 5V constant voltage power supply can be done to charge the input power supply, the most matching charger for 5V1A above (Mobile Charger) Output port: USB Output parameters: 5V1A/5V2A Size: 69 X 32 X 8 mm (LxWxH) Requirements for rechargeable batteries: Batteries Can be used with module : 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. Batteries Can not be used with module: 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. Safe Design: Power has designs of overcharge, overdischarge, short circuit protection, does not need to worry about the time of charging Intelligent Output.When equipment is fully charged, it will stop charging automatically to prevent from overcharging Power has multiple safe designs.Output voltage and current is stable, never to damage user’s device Operating temperature range is wide (-20 Clecius—50 Clecius),can provide over temperature protection Function Feature: with a hightlight LED lamp (long press or double click power key can start) Charging Display: When charging 0-25% one light is on, other light is off; 25%–50%, the second light flashes,the first light is continously on;50%– 75%, the third light flashes,front two lights are continuously on;75%—100%;the fourth light flashes, front three lights are continuouly on. And four lights are on charging to 100%.