1. Small volume, high power, high efficiency. 2. Full protocol, the mainstream open protocol basically support the charging current up to 5A, efficiency up to 96% output power up to 22.5W, efficiency up to 95%. 3. Module for 3.7V lithium batteries, including polymer, 18650, 21700 lithium batteries. 4. Module volume is relatively small, the heat dissipation area is limited, high-power output heat is a normal phenomenon. 5. Wide range of product applications, suitable for a variety of industrial DIY occasions. Automatic load detection / light load detection. High-current USB output interface. Support small current mode. Support digital tube display and LED power indicator Output overcurrent/short circuit protection Charge timeout/over-voltage protection Support PPS/PD3.0/PD2.0 Support QC4+/QC4/QC3.0/QC2.0 Support FCP, SCP (5V4.5A or 4.5V/5A) Support FCP, SCP, HSCP Support SFCP to charge battery Support PD3.0/PD2.0, AFCFCP, SCP , PE1.1 NOTE: 1. Battery and motherboard cable can not be too thin, try to be thicker. Fast charging board requirements can pass 10A current non-fast charging board should also be able to pass 7A current. Can not be too long, the interface needs to be welded. 2. Batteries can only be connected in parallel (parallel number is not limited), not in series, series must burn the motherboard. 3. Normal application, the battery must be welded, (wire twisting will be insufficient power supply), the battery reverse motherboard must burn. Never pay attention. Line as thick and short. 4. Access to the battery to determine access to the 3.7V battery, not other batteries. Ensure that the battery is not connected in series, otherwise the battery terminal access voltage higher than 4.5V may burn the board. Note:Due to different production batches, there are diffe