In the power adapter product nameplate, there is usually a parameter called the efficiency level (Efficiency Level), usually expressed in Roman numerals, which relates to the efficiency of the power adapter. The higher the energy efficiency level, the higher the efficiency of the power supply.

   In fact, early power adapters were not limited by energy efficiency. Due to the increasing number of electronic products, in order to supply power to the devices, too much power was consumed on the power adapter, which caused great pressure on the environment. Therefore, an energy efficiency rating scheme was promulgated. Manufacturers in many countries have also adopted it.

   The energy efficiency class is now an important parameter of the power adapter. It has an impact on the selection and export of the power adapter. For example, the United States has now imposed a level 6 energy efficiency standard.

    Increasing the energy efficiency of the power supply is a general trend, but not all manufacturers have the kind of technical strength. In this process, many weak power manufacturers with poor technology will be slowly eliminated. At present, all power adapters of DLI have been upgraded to Level 6 energy efficiency standards, which are more efficient and environmentally friendly.