Can I use a different power supply as a replacement for the original?

Question

Hello, My laptop power supply is burnt, the original power supply from the set - the original one has such a data plate as I have a different power supply at home - a replacement from another laptop that has a data plate only such a sticker . Does this power supply replacement correspond to the...

jankolo · Accepted Answer

The current consumption of the original power supply was 4.75A and the one you want to use as a replacement is only 3A. So you can't.

mat_ed · Accepted Answer

Minimum 4.75A, if there is more, nothing will happen.

mat_ed · Accepted Answer

Using a gauge.

S_Goryl · Accepted Answer

Check with an ohmmeter. The housings of the USB, RS232, LPT, VGA sockets should be on -, so check if there is a transition between them and any of the pins on the power socket. edit: mat_ed was faster ... And as for the current: I would let go of this 0.01A difference

S_Goryl · Accepted Answer

Check on the spot - no one will forbid you. And 0.01A is, if I'm not mistaken, 0.2% of the current value. Such a difference must not in any way affect the operation of the system. Average tolerances are +/- 5%.

cyruss · Accepted Answer

Everyone about electricity and no one about tension ... The original had - if I can see correctly - 20V, and the replacement must have the same amount. You should not be refused an on-the-spot check by the seller, you have the right to do so. On the other hand, the return of an efficient and not suitable one is only the goodwill of the seller, there is no such obligation.

cyruss · Accepted Answer

Not 18-24V but only 20V, the original has 20V marked on the sticker. If I can see correctly.

jurek1980 · Accepted Answer

Maybe lift the diamond of secrecy and write what kind of laptop it is. From what I can see from this power supply, it is probably a replacement for some previous one. There should be a plate on the bottom of the laptop and everything should be on it: voltage, current, and sometimes even polarity. This power supply you have max4.74A but at the lowest voltage, i.e. 18v. You have written like a bull that the max power supply is 90watt, so with the 20v marked on the plate it will have 4.5A.

skaktus · Accepted Answer

You have it written like a bull: Normal: DC-Output 20 V, 4.5 A, 90 W and look for such a minimum. The voltage must be 20 V and it shouldn't be different. The amperage should be a minimum of 4.5 and you are looking for 4.5 or more to have a reserve. PS-how do you know that your power supply is burnt? Didn't the cable break by accident? Many think that the power supply is hot and it is enough to replace the cable and that's it.

tzok · Accepted Answer

If there will be 19V or 22V, then nothing will happen, these 4.5A are already given with some margin, moreover, if you have a mobile processor, 3.25A is enough. If you have a power supply that fits the pin, you may have a problem if you want to work with 100% use of the CPU with full brightness of the matrix and a completely discharged battery ... As for the above - the most common right is the wire near the plug, or at the power supply housing.

skaktus · Accepted Answer

From my experience, I know from CA that they don't like changes in tensions. A colleague connected 22 V instead of 20 and it ended up not charging ... permanently.

skaktus · Accepted Answer

asziatko - why haven't you looked on the internet? On the Allegro at auction number: 573858662 you have power supplies for della 20V 4.5A for PLN 30. Just swap the cable and it works. On another auction, No. 579849063, you have 20V and a 6A for CA ... It was enough to search

dzg4 · Accepted Answer

You will be lucky if a Chinese burns without causing a laptop failure, it is better to spend up to 150 PLN than to buy a new laptop. From your own practice.

asziatko · Answer

Hmm ... so 1.75A is missing. So now when I buy a replacement, it must be 4.75A ?.

asziatko · Answer

mat_ed , Thank you for your response. Tomorrow after looking for such a replacement for the power supply that it has a minimum of 4.75A. If I don't know something, I will ask on the Forum.

jankolo · Answer

Also pay close attention to the voltage polarity.

asziatko · Answer

jankolo right, good that you wrote. Such polarization, which is e.g. on the replacement on this sticker, is it correct or should it be different?

gilus1 · Answer

It is not known, because I cannot find the polarization pattern on the original.

asziatko · Answer

The fact is that this diagram is not on the original and it is not known what it is - can you check it somehow? On the other hand, if there is a replacement for this model, it should be OK.

asziatko · Answer

From what I was looking at ON LINE, most of the power supplies are 4.74A - that's not enough. As it is already 4.75A, I admit that such a replacement costs quite a lot.

asziatko · Answer

0.01A may be important, it may not be - it is difficult to say 100%. For now, I have looked ON LINE, tomorrow I will see at home in the city if they have something on hand and at what price at all. This may not be a typical question - is there a possibility, can I suggest how to buy a power adapter in my place of residence, that if the laptop does not work on it, I will give it back or take a laptop with me and on the spot to connect the power adapter and see if the laptop works? Or is it rather the laws of trading that do not allow you to buy at your own risk?

asziatko · Answer

OK, if there is something for me, just in case I will take my laptop with me and check on the spot if it works for a replacement. So it must have 18 - 24V or more specifically 20V and 4.74 or more A.

asziatko · Answer

When looking live at the data plate on the power supply, only the 20V position is in fact marked. And at the top it says 18 - 24V.

asziatko · Answer

The laptop is a California Access model CA 6900. A bit older model. The power supply is like that from the news with this one I bought it with. It was bought in a store not at an auction or from another person. I found the PL instruction on the Electrode Pl for this laptop and there is also nothing about polarity, only this and There is nothing about polarity on the back of the laptop either. So now you have to look for a 4.5A or 4.75A and 20V power supply?

asziatko · Answer

Today I found in only one shop in my city a replacement power supply for this original, typical as the original 20V and 4.75A for PLN 115, you have to admit a lot. It is a set with a number of tips (probably 10 different tips), a cable for 230V, a power supply and a cable with a cigarette lighter tip. 2-year warranty, PL production. I did not buy it, maybe I can get something cheaper, somewhere like PLN 115. You say so cactus that CA that they do not like changes in tensions ?. So it has to be typical like the original 20V and 4.75A?

asziatko · Answer

cactus thanks for the listing numbers. I admit that if I would buy it, it is something cheaper but with a guarantee and not to be modified. Even after looking on the Internet, maybe there will be something in the ON LINE stores.

tzok · Answer

Rather a coincidence, because especially these Chinese replacements do not have good stabilization ... this voltage goes to the DC-DC converter inside the laptop anyway.

dzg4 · Answer

The polarity is marked in the photo + is inside a - outside and do not take Chinese because they fall like flies. If you can take 18-19V 6A letterhead as the previous speakers suggest.

skaktus · Answer

The problem is that such power supplies in online stores are much more expensive and the same as on the Internet. Here you have a new one for PLN 69 and it gives you a lot more than you need: 579 711 123 Make an effort and search the internet on the allegro - it's full of it. It is possible, but I also do not see the point of working the inverter in a laptop at a higher speed, because they often work practically at maximum speed.

Can I use a different power supply as a replacement for the original?

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