Boost Power Module with TypeC charging protection Wide compatibility and protection The boost power module can be widely used with devices such as PDA, MP3 player, MP4 player, digital camera, game console, notebook computer, mobile phone, solar charging setups, audio equipment, portable equipment, POS terminals, electric fans, and other TypeC charging equipment. Provides battery overvoltage protection, protection when battery voltage is lower than input, and battery shortcircuit protection. CR LED serves as the charging status indicator; OK LED indicates fully charged or constant voltage mode. Lithium Battery Charger Board specifications Charging voltage: 16.8 V Charging current: 0.28 A Operating temperature: 40 C to 85 C Style: 4S 1A Input voltage: DC 36 V Input current: 1 A Total size: 39 mm x 18 mm x 6.3 mm (L x W x T); 1.54 x 0.71 x 0.25 inches Package: 3 pieces of Step Up Charger Board Battery charging protection board features performance, easy to understand Convenient to install and operate Good adaptability to input power with limited driving capacity Wide application How to use 1. Connect input power 2. Adjust output voltage 3. Connect load Use scenarios DIY battery charging for a 4S Liion pack from a lowvoltage source such as solar panels or a DC supply (36 V), charging at up to 16.8 V and 0.28 A. Integrating into TypeC charging equipment to provide battery overvoltage protection, inputundervoltage protection, and shortcircuit protection for portable devices. Use in portable or field applications requiring a compact 4S battery charging solution, such as charging a 4S pack for drones, handheld devices, or review/ setups, with protection and status indication for safe operation.