Operation Manual: 1. Type-c female base and the power input end of + ~ welding pad position next to it, connect to 5V input voltage. 2. B+ is connected to the positive electrode of lithium battery, and B~ is connected to the negative electrode of lithium battery. OUT+ OUT connect loads, such as set-up board. 3. Connect the battery to B+ B-, insert the phone charger to USB, the blue light is on, indicating that there is a power supply, the red light flashes, indicating that it is charging. When the charge is full, the red light stops flashing and turns into a regular light. 4. OUT+ OUT- terminated can be load. After load on, the red light is always on. When there is a power supply at the input end, obtain current from the output end of the power supply. If there is no power supply, obtain current from the battery. When the battery voltage is lower than 2.5v, automatically close the output.