Lithium Battery Charging Boost Power Supply Module ,Type-C USB 2/3S BMS 15W 8.4V 12.6V 1.5A Lithium Battery Charging Boost Power Supply Module Support Fast Charge with Indicator Features: Support QC fast charging. The charging current can be adjusted. The booster charging efficiency is 94%. Adjustable charging timeout protection. 15W synchronous switch boost charging. Input overvoltage and undervoltage protection. 2 or 3 strings of lithium batteries can be set for charging. Output over current, over voltage, short circuit protection. Specifications: Input : type-c port or wire input Output: support 2 strings and 3 strings, the battery needs to add a protection plate Current setting: two parallel current Settings Streams default to 100K(0.9A) and 180K (0.5A). According to your own needs remove or replace the resistor. The formula is current =90000/ resistance Battery charging voltage setting: the default single string is 4.2V, general battery that's the same value, you don't have to change it. If you need to change, check the RVSET Settings table, just set the board VSET resistance LED indicator light: normal red light is on, charging process blue light, charging. When the indicator is full, the blue indicator turns off and blinks when an exception is detected. Note: 1. Due to the light and screen difference, the item's color may be slightly different from the pictures. 2. Please allow 1-3cm differences due to manual measurement. Package Included: 1x Lithium Battery Charging Boost Power Supply Module