1 The board uses MOS components, which can be easily destroyed by static electricity. Please use a soldering iron with a ground wire and take anti-static measures. 2 To add an on/off switch, connect the switch across the SW pins. For an "always on" +5 VDC power supply, just jumper the SW pins (the red LED will stay illuminated). 3 The board has short-circuit and other protections. If it seems not to work, remove to battery and input +5 VDC across the battery terminals to reset the board. 4 If the load is less than 2 W, the input can be 5V 1A. If the load is more than 2 W (but less than 5 W), use 5V 2A for input. 5 The load current should less than 1A. To control a greater load, use two or more boards in parallel. Suggested Applications: 1 Use it as a power bank. 2 Use it as a lithium battery charger 3 Use it as a 5V UPS for Raspberry pi or other MCU
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