Now more convenient is the notebook computer, the notebook computer is relatively small, easy to carry, it is of great convenience to our life, we have a computer laptop charger, the charger is similar to a power supply , we must first know power supply applied voltage and so on, before use must be to confirm, if the number of volts they would be consistent with each other, not the same words will not be able to use each other, so before use to confirm the better, but also relatively safe. In everyday life, be careful, especially the things that involve electricity, and be careful or better.