5V 2A Power Bank Charger Circuit Board Portable Power Supply Module Step Up Board Double USB Output For DIY

Safe Design:

1.Power has designs of overcharge, overdischarge, short circuit protection, does not need to worry about the time of charging
2.Intelligent Output.When equipment is fully charged, it will stop charging automatically to prevent from overcharging
3.Power has multipke safe designs.Output voltage and current is stable, never to damage user's device
4.Operating temperature range is wide (-20-+50),can provide over tmperature protection
Function Feature: with a hightlight LED lamp (long press or double click power key can start)
Electricity Quantity Display:4 class LED light display electricity quantity, non-operating state will be intelligently off

    Charging Display:when charging 0-25% one light is on,other lightis 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%.   
    Mainboard Protection Function:overcharge protection, overdischarge protection, overcurrent protection. Power does not need protection board.If you have it, please unload.

Installation Introduction:

1.Circuit board B- connects power negative, B+ connects positive.Don't inversely connect,it will result in burning of board. Power is series soldering,so please make sure the insulation between power and circuit when install the battery
2.Double press the switch,flashlight LED light starts,then double press tyrn it off
3.Double press starts flashlight,then press once,light will be lighting.Then touch once start SOS mode,and press one more time turn off LED
4.2A output is not continuous current,it changes according to USB connecting load automatic current output
5.Insurance reisitor.If battery connects incorrectly,the polarity will burn.