If you have the power Dell PA-12 adapter

To understand these concepts, we can determine the second question of this article. The same nominal power supply voltage, output current is different, the same can be used in the books. The underlying principle is the nominal current of large power can be replaced by a small nominal current of the power. Some of our friends there was any misunderstanding, I feel great nominal current of the power will burn books, because the current big Well. How much current is actually the same situation in the voltage depends on the load, that is, the work of books, when the books when the high load operation, the current was much bigger when the books go into standby, the current on the smaller, short current equal to added to the books the voltage divided by the books on the equivalent resistance. Large nominal current power supply has sufficient current margin and will not replace the current power after a small nominal output voltage is too low or overheating situation. On the contrary, with a small current is replaced by high-current power supply on the existence of such a risk. But some friends to use 56w instead of 72w power of using them is also no problem, because the power adapter is usually designed to leave a margin, load power must be less than the power supply power, so this place is in general use feasible, but the margin on the remaining Power are few, and the books once you pick a lot of peripherals, such as the two usb hard drive, and then cpu running at full speed, and then there is a base with a drive at full speed to read the disk, and then with the same time charging the battery, estimated to be dangerous, it is necessary to keep your hands touch the power supply is not already a boiled egg. 72w more than the 16w adapter, 56w is the deal with this situation. So it is best not to use the small high-current power instead of high-current power supply. If you really do, conditional friends can try to Cece largest consumer of your books, when the actual needs of current measurement method is simple, a socket, a plug, an ammeter, Jigen wire, a soldering iron can be. If you have the power Dell PA-12 adapter HP PA-1900-05C1 adapter
HP pavilion DV1000 Adapter hp 375143-001 adapter within the nominal current, of course, is safe. Answered the second question, the third question is very simple. Let us not doubt the power of your problem, first look at your books are doing, is not like the above said two usb hard drives, cpu running at full speed, hard disk read and write crazy, drive at full speed to read the disk, while charging the battery, loud the music, the screen brightness of the largest wireless network card has been detected signal, etc., make good use of power management, according to mandate a reasonable adjustment of the working state of books is very important. A lot of people do not like power management, I can even see a lot of friends after the installation of the power management software does not want any kind of management mode is enabled, then he should still be doing? Will not just want to see how much percent of battery left for you?