Features: Module in the small size still have a perfect Protective function, integrated output overcurrents input undervoltage, overvoltage, over-temperature and other Protective functions. 18W input, 5V input 8V output, conversion efficiency 94% 8V/1.5A output conversion efficiency 92%. With input voltages limit function can intelligently adjust the charging. The module can apply for fast charging voltages according to battery voltages to improve charging speed and efficiency and shorten charging time. Adopt synchronous switching architecture to reduce the size and improve the efficiency of the module boost switching charging Converters operating frequency of 500KHz. The module defaults to 3 series battery charging resistors to switching to 2 series battery charging. Specifications: Size:Approx.9x16mm/0.35x0.62inch Package Includes: 1Pc Charging Module note: 1.Please allow 1-2cm errors due to manual measurement, making sure that you not mind before order. 2.Due to the differences between different monitors, the picture may not reflect the actual of the item.