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Feature

Funcion 1 :step up board, with 18650 battery case, 3.7v step up to 5v output
Funcion 2,charing board, input 5v 1A or 2A to charge the 18650 battery
Funcion 3: Battery protection, Over-charge protection, over-discharge protection, over-current protection, over-temperature protection, output short circuit protection
funcion 4: UPSUninterrupted power supply):if input 5v, it will charge the battery and no use the battery power to step up ; if power failure, it will automatically use the battery power.
You can use two or more in parallel to get more output power

Description

Note:
1 if the loadless than 2 Watt, you can input 5V 1A;if the load more than 2 Watt,less than Watt, please use 5V 2A for input.
2 if you want a add switch , please add it on SW pin, it can control the output, otherwise, please short SW pin.
3 the Load current should less than 1A (500ma)(400ma), if you want to control greater load, please use two or more board in parallel.
4. the board with short circuit and other protection, if make a mistake and short it, please input 5v to Reactivate it
5 the board has Mos components,which easy destroyed by static electricity,so Please take anti-static measures to operate.
Tip:
1 you can use it as a power bank.
2 you can use it as a charger for lithium battery.
3 as 5V UPS for raspberry pi or other MCU