First, the Australian regulatory power adapter (hereinafter referred to as the power) of the nominal voltage and current is what does this mean? First, the general nominal supply voltage, means open-circuit output voltage, i.e. the outside is not connected to any load, no current when the output voltage, so it can be understood that this is the upper limit voltage power supply output voltage.

For the case of a power regulator's internal use of the active element, even if the mains voltage fluctuations, and its output is a constant value, as the market in general small transformer, such as the Walkman and the like with the power supply, if the mains fluctuations, the output of the power supply will follow fluctuations.

Generally true no-load voltage of ordinary power adapter and not necessarily exactly the same nominal voltage, because the characteristics of the electronic components can not be exactly the same, so there is some error, the error is smaller, higher consistency requirements of electronic components the cost of production is high, so the price will be expensive.

Further, the nominal current value, regardless of any power supply has a certain resistance, and therefore when the power supply output current when the voltage drop generated internally, resulting in two things, one is to generate heat, so the power will be hot, and the other one is led to the output voltage decreases, the equivalent internal consumption.

Second, are the same nominal voltage of the power supply, the output current is different and can not be used on the same books?