This is a power expansion board kit especially designed for Raspberry Pi.
Two power supply modes: GPIO power output and USB power out.
Supports charging while discharging,(it's stable output,the maximum output current can up to 1.8A while charging,but the chip heat will become larger.Maybe you can place a external heatsilk on clip.).
Maximum discharge current: 2A,Maximum charge current: 1.8A.
Note:It's only a UPS HAT board, you need buy a lithium battery(3.7V) to use it;it's more convenient to replace more High-capacity battery.