Protection prevents the battery overcharging or over discharging, and automatically controls the charging current, better protecting the battery.
USB Type-C female interface.
These only work with a USB A-to-C cable, they will not work with a USB C-to-C cable.
Specification:
Input voltage: 4.5V-5V
Maximum charging current: 1000mA
Charging cut-off voltage: 4.2V+-1%
Battery over discharge protection voltage: 2.5V /3A
Board size: 2.8cm*1.7cm/1.1*0.66''
Package weight: 3g
Connections:
B+ to battery positive
B- to battery negative
Out+ to load positive
Out- to load negative
5V power is supplied either by USB C or it can be hard-wired 5V positive to the connection marked + next r8 and 5V earth to the corresponding connection on the other side of the USB socket.