1.When the power supply is powered,the power supply directly supplies power to the load through the boost circuit and charges the battery at the same time. 2.Once the power supply is cut off,the battery path is automatically activated to supply power to the load through the boost circuit. 3. power can reach 20W,rated power can reach 15W,BOST boost circuit,built-in 12A high current MOS, efficiency up to 96%. 4.Module static power consumption 25mA,12V output(Recommended normal load is Less than 15W. output 12V: current 1.2A). 5.Battery protection:overshoot,over-discharge,over-temperature,over-current protection (if it enters the protection state and does not output after a short circuit by mistake, it automatically activate and restore the output when connected to 5V charging). Output voltage:12V Module mounting hole diameter:3mm Note:The dual-color LED indicates the charging status.When fully ,the green light is always on and charging stops automatically. Colour:Green&Black Material:PCB+electronic components+plastic Package Contents: 2 x Type-C 15W 3A 18650 Lithium Battery Charger Module Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.