In our daily life, often see the power adapter, due to a variety of performance parameters, so can not arbitrarily use the power adapter to charge, before choosing the power adapter need to meet the following three adaptation conditions:
1. The interface of the adapter matches the device;
2. The output voltage must be the same as the rated input voltage of the load (mobile equipment), or in the voltage range that the load (mobile equipment) can bear, otherwise, it may burn the load (mobile equipment);
3, the output current of the power adapter should be equal to, greater than the current of the load (mobile equipment), to provide enough power;
The following to the above three adaptation conditions for analysis.
1, do not plug the mismatch interface in the absence of professional knowledge, otherwise it will be dangerous.
2, for why the voltage is consistent, in principle, it is so - insufficient voltage, not enough to drive the load, the battery can not charge normally, said the popular point is short of supply.
3. For why such a current configuration is needed, it involves the principle of the circuit. We all know that the power supply has internal resistance, and the greater the internal resistance, the greater the loss. Therefore, when the manufacturer produces this power adapter, it will determine the no-load output voltage within a certain range according to the size of the internal resistance. So choosing an adapter with a slightly higher current won't hurt the battery, and will actually make charging faster.
