Review on 🔋 Versatile 4-in-1 Board UPS: Efficient Raspberry Pi 18650 Battery Charger, 3.7V to 5V 12V Conversion, Built-in Protection (5V 15W Output) by Jeff Robeson

Good board but poorly written documentation. Here's a paraphrase/explanation that might help: • The board uses MOS components that are easily destroyed by static electricity. Use a soldering iron with a ground wire and take antistatic measures. • To add an on/off switch, connect the switch to the SW terminals. For an "always on" +5 VDC power supply, place a jumper across the SW pins (the red LED will be on). • The circuit board has short circuit protection and other protections. If this doesn't seem to work, remove the battery and apply +5VDC to the battery terminals to reset the board. • When the load is less than 2W, the input can be 5V 1A. When the load is more than 2W (but less than 5W), use 5V 2A as input. • The load current must be less than 1A. To run a larger load, use two or more boards in parallel. Recommended Applications: • Use as a power supply. • Use as a charger for lithium batteries. • Use as a 5V UPS for Raspberry Pi or other microcontrollers.