1. Support 22.5W high-power fast charging output to meet the needs of fast charging and improve the efficiency of use 2. Compatible with QC4+ and PD3.0 mainstream fast charging protocols, adapt to a variety of devices, and enhance versatility 3. The product supports low current mode, supports digital tube display, and is more convenient to use 4. Designed specifically for 3.7V ternary lithium batteries, providing stable and efficient energy conversion and protection mechanism 5. Suitable for DIY mobile power projects, easy to customize fast charging solutions Module interface: The product is suitable for single-string 3.7V (full 4.2V) ternary lithium batteries Button: When short-pressed, open the USB port and light-load Type-C output port to discharge and display the power When double-clicked, close the USB port and Type-C output port, power display If there is an external power If the source exists, only the output port is closed Type-C port: supports input and output USB port: high current output interface B+: positive battery interface, must be welded when used, the wire must be thick and not too long B-: negative battery interface, must be welded when used, the wire must be thick and not too long After the module is wired, use a multimeter to measure whether the voltage of the B+ and B- contacts during charging and discharging of the module is consistent or the difference is very small. If the difference is large, there is a problem with the wiring or the battery is aging Supported protocols: Support BC1.2/5V2.4A Support PD2.0/PD3.0 Support QC2.0/QC3.0/QC4.0 Support AFC, FCP, SCP, PPS, SFCP Support VOOC, DASH, WARPPE2.0, PE1.1 Specifications: A Digital display Color: As Shown Material: Plastic+Electronic Component Package