Is the power adapter universal?

The power adapter cannot be used universally for the following reasons: 1. The voltage must be consistent, otherwise it will burn out the electrical appliance or fail to work; 2. The "output current" of the power adapter must be greater than the working current of the electrical appliance, otherwise The power adapter will burn out due to "over current"; 3. The interface between the power adapter and the electrical appliance must match, otherwise it cannot be connected; 4. The positive and negative polarities must be consistent to avoid accidents.

#The operating environment of this tutorial: Windows 7 system, Dell G3 computer.

Can the power adapter be universal?

Can't.

1. "Power adapters" of different specifications cannot be used universally. The key points are:

①The voltage must be consistent, otherwise the electrical appliance will be burned or fail to work.

②The "output current" of the power adapter must be greater than the working current of the electrical appliance, otherwise, the power adapter will burn out due to "overcurrent".

③The interface between the power adapter and the electrical appliance must match, otherwise the connection cannot be made.

④The positive and negative polarities must be consistent to avoid accidents.

2. What kind of power adapter can be used universally?

The power adapter can be replaced if it has appropriate voltage and current is not less than the original power supply.

The appropriate voltage means that the voltage of the power adapter can be used as long as it is 4V or more higher than the battery voltage of the notebook. Otherwise, because the voltage is not enough, the working voltage required for charging and protecting the circuit of the notebook cannot be turned on. Difference.

The 11.1V battery requires a power adapter voltage of 15V or above, and the 14.8V battery requires a voltage of 19V or above.

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