I have a question about a power supply?

I have three different laptops (without battery) and now I need a universal power supply with which I can operate all three. Of course not all of them together, but individually, but I can simply use a power supply unit there, B. 7A? As an example: If a laptop now has 4.5A, can I use the 7A power supply?

Yes the current (ampere) may be higher only not lower. But the tension must be the same.

You can. The laptop just pulls 4.5A.

Another example: A household socket is fused with 10A, which is 2300 watts. Nevertheless, you can operate a 40 watt light bulb on it.

Please give us the laptop models.

If you are lucky, a power supply fits everyone.

That should not normally be possible, because with 12V others work with 19V. There's also polarity and current.

In addition, different manufacturers have plugs.

https://www.ebay.de/...=138392313

Thanks a lot

So one is an HP 8710w, then I have a Lenovo Thinkpad T500 and T42p

Thank you for your quick reply

If the power supply breaks and ruins a laptop, then 3 matching NTs would have been worth it.

So would you rather buy 1 power supply for the respective model? Because I introduced it like this: I want to try out with the power adapter whether the laptops still work and then I would buy a suitable battery for each model. Is this possible?

To HP

https://www.netzteiledirekt.de/index.php?main_page=product_info&cPath=41_1&products_id=96919

To T500

https://www.ebay.de/...=137597240

To T42p

http://www.netzteilekaufen.de/pro.php?id=156489_3982

If you compare the 3, you'd better use the original power supplies.

I would look for a buddy who has suitable power supplies. On the links you will find information on voltage and current. If the power adapter is missing, the hard drive may have been removed. Where do you live?

So, the HP lacks the hard drive, the other two should still be inside

I found a power supply with adjustable voltage. Can i use that?

Which electricity can be drawn?

If you have an Ubuntu or emergency DVD, you can test without a hard drive.

So this is the power supply: https://www.amazon.de/...007HXN064/

I actually found an Ubuntu disc in another laptop. Hopefully it still works.

In any case, thank you for your help. Only I'm not quite sure if the power supply fits everyone. I (as a loan) would have said yes. What do you mean?

I would be really grateful if you could answer this question for me.

It will definitely still work. Ask about friendship, then you can write directly. When the Ubuntu DVD starts, write down the version and send it to me.

Yes, I do, but does the power supply work?

I research and then I report. Your NT you is variable. What about I?

So the voltage is variable, I'm not sure of the current. So if the power supply works, then I order it, then I insert the Ubuntu disc and then I can send you the version. I thank you for your trouble. See you tomorrow and have a nice evening.

The list on Amazon says HP and Lenovo.

Ie it should go for all cases (3).

I couldn't read the current. It should work for the universal power supply.

You can do that, the voltage must be right, the current may be higher, but not lower than the device requires. I'm not a friend of such power supplies, because you quickly switched on the wrong voltage and the connected device is gone.

The ampere specification is the maximum permissible current. The size of the actual current is determined by the laptop. Therefore, the maximum permissible current of the power supply must always be higher than that required by the laptop, and it should be so that the power supply is not overloaded.

I think it is risky to use a power supply alternately for notebooks with different voltages, since the laptop will be destroyed if you accidentally take the voltage from a previous one too high.

Thank you for your help. It's risky, but is it technically possible if I think about changing the tension?

All right, thank you for your help

Alright, thank you very much

Sure, have described the reasons. Why do you ask?

Because I probably still want to use such a power supply. Now I've even found one that adapts automatically.

Here is the link https://www.mediamarkt.de/...55758.html

I hope that the part does what it promises. Have you already had experience with something like this or something similar?