Theoretically . Original power certainly better, but the actual use may not feel the difference. Usually we have a safety device input voltage range , such as a 2.5 mobile hard disk , it is plus or minus 5% requirement 5V , too high or too low, the protection circuit will stop the device work. If the protection circuit is activated, it means that before this, your machine has been close to or exceeded its design can withstand the upper or lower limit , which is the life of the machine are influential . ( Of course , non-original power mentioned here , or good workmanship , poor quality products , do not mention it. )
The more important question may be the books of data security, automatic protection of a sudden stop working for a computer is a terrible thing , especially a lot of friends without the battery . Sometimes inexplicable restart the computer , and this is also relevant .
1.3
For the original power supply , the manufacturers are aware of their power needs much load capacity , calculated from the nominal voltage and current security certainly far more accurate .
However, if the use of non- original equipment adapter , such as general-purpose transformers and the like, these issues can not be taken seriously , this is the user can only try to think of ways to get from the power supply parameters are compatible , but the internal resistance of each adapter is different, nominal voltage tolerance may be different, the nominal output voltage variation range of the current may also vary if you are not careful measurements of the relevant values , certainly , there is a risk