Adjustable charging current Input over-voltage and under-voltage protection Adjustable charging timeout protection Output over-current, over-voltage, short circuit protection The module is applicable to two or three channeled 3.7V lithium batteries. By short circuit setting, the default is two strings. When two strings are used, the module can use its own battery equalization function, which is very practical. The type-c port and welding wire can be used for input. When the type-c port is connected to the fast charging power supply, the charging voltage is automatically adjusted to improve efficiency. If the input voltage is less than the battery voltage when the welding wire is input, the module can only work in the boost state. DUE to Different Batches, The Apperance, Color and Printing of the Product May Be Different, which does not affect use. Type:3S Colour:Black Material:PCB Package Contents: 5 * 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. Support QC fast charge 15W synchronous switching boost charging Boost charging efficiency 94% Can be set to charge 2 or 3 strings of lithium batteries 2 strings with balanced charging