First, the same nominal voltage of the power, but different output current, can be used in the same laptop?
Same voltage, different output current, can be used in the same laptop. The basic principle is the power of large nominal current can replace the small nominal current. Switching power supply When laptop of high load operation, the current is larger,but when laptopgoes into standby the current is smaller. The power of the nominal current with enough current margin. Conversely, someone using power 56w instead of 72w ,it is also not a problem. The power adapter leaves a margin, load power must be less than the power supply power,.For this, it is feasible in the general use of above, but the remaining power is few.Once your laptop picked up a lot of peripherals, such as two usb hard drive, and then cpu being running at full speed, and then with a base, to drive at full speed to read the disk, also to charge the battery at the same time, it is estimated that dangerous..At any time, to feel the power can boil eggs or not. So it is better not to use low current power supply to instead of the high-current power.
Secondly,Exactly the same laptop, someone else's power is warmer, but mine is very hot, why?
Do not doubt with your power, take a look at what are your laptop doing?Is it that like the above said :two USB hard driver, CPU running at full speed, crazy to read and write to CD-ROM drive at full speed to read the disk, at the same time charging the battery, loudly playing music, screen brightness, wireless LAN has been in the detection signal.To make good use of power management, it is very important to adjust the laptop of the state according to the task of rationally.
Thirdly, the nominal voltage is much higher than my laptop battery voltage , what will happen?First, we must know that it is different that the laptop power is supplied by power or battery..Battery-powered, the battery output is pure DC, very clean.The voltage of the battery can not even do not need to design very highly, chemical properties of lithium determines the output voltage of a power-saving core can only be about 3.6V. so many batteries are based on three series, then 10.8V battery voltage became very popular. But ,in order to protect the battery.the nominal value of some cells, is slightly larger than an integer multiple of 3.6V, such as 3.7V or 11.2V .
.Don't worry,the voltage that was really added to the voltage on the batteries won't be the nominal voltage of your power.