Do you think this is such a simple matter?

I am looking for a laptop adapter and I don't know how to choose it
We don't care about the power supplies as much as we care about laptops, which is a pity because Power Supply is a very important element of our computer. And when it stops working, we face the difficult task of buying a new one. Because, contrary to appearances, this is not such an easy matter. Those who already know it they were looking for a power supply typing in google laptop name. And the name is not everything. To make it right choose a laptop adapter we must know power supply parameters AC, i.e. the power supply voltage in volts and current in amperes. The plug is also very important, there are several dozen types of different tips on the market.
Can you use one power adapter for several laptops?
Let's take care of the power supplies while they are still working. Mostly power supply damage This is cable damage, try not to twist the cord, get it tangled or pull too much. Let's not put it too close to the heat source and, above all, choose it properly for the laptop. Voltage in Volts must match the value on the laptop. And the intensity can be greater than the laptop requires, but never less because it can damage your computer . The plug is selected in terms of size (we can measure with a caliper)
Laptop-compatible power supply
HP Compaq Business Notebook PC nx9000 DF981A, DF982A, DF984A, DF985A, DF986A, DF987A, DG211A, DG212A, DG213A, DG214A, DG223T, DG224T, DG225T, DG672A, DG673A, DG674A, DG675A6 DGA, DG675A6, DGA, DG675A , DG864A, DG865A, DG866A, DG868A, DG869A, DG870A, DG871A, DG872A, DG873A, DG874A, DG875A, DG876A, DG877A, DG878A, DG879A, DG880A, DG881A, DG882A, DG883S8, DG883A8, DG8 , DJ160S, DJ166S, DJ167S, DJ168S, DJ170S, DJ171S, DJ174S, DK452A, DK453A, DK787A, DK788A, DK789A, DK790A, DK938A, DK939A, DL015P, DL016P, DL040P, DL1989 DLA DL199 , DL935A, DM307P, DM308P, DM309P, DM310P, DM311P, DM316P, DM317P, DM318P, DM325P, DM556A, DM643A
HP Compaq Business Notebook PC nx9005 DF988A, DF989A, DF990A, DF992A, DF993A, DF994A, DG194A, DG195A, DG196A, DG200A, DG201A, DG202A, DG203A, DG220T, DG221T, DG222T