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

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  • #1 6284968
    asziatko
    Level 21  
    Hello,

    My laptop power supply is burnt, the original power supply from the set - the original one has such a data plate as

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

    I have a different power supply at home - a replacement from another laptop that has a data plate only such a sticker

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

    . Does this power supply replacement correspond to the original ?. Can I connect a replacement power supply to this laptop that was the original (which burned) without fear that the laptop will be damaged ?.

    Regards,
    Arthur
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    #2 6284984
    jankolo
    Rest in Peace  
    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.
  • #3 6285006
    asziatko
    Level 21  
    Hmm ... so 1.75A is missing. So now when I buy a replacement, it must be 4.75A ?.
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    #4 6285025
    mat_ed
    Level 43  
    Minimum 4.75A, if there is more, nothing will happen.
  • #5 6285030
    asziatko
    Level 21  
    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.
  • #6 6285031
    jankolo
    Rest in Peace  
    Also pay close attention to the voltage polarity.
  • #7 6285041
    asziatko
    Level 21  
    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?
  • #8 6285486
    gilus1
    Level 29  
    It is not known, because I cannot find the polarization pattern on the original.
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  • #9 6286657
    asziatko
    Level 21  
    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.
  • Helpful post
    #10 6286718
    mat_ed
    Level 43  
    Quote:
    ... can you check it somehow ?.

    Using a gauge.
  • #11 6286725
    asziatko
    Level 21  
    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.
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    #12 6286738
    S_Goryl
    Level 13  
    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 :D
  • #13 6286790
    asziatko
    Level 21  
    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?
  • Helpful post
    #14 6286825
    S_Goryl
    Level 13  
    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%.
  • Helpful post
    #15 6286871
    cyruss
    Level 31  
    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.
  • #16 6286872
    asziatko
    Level 21  
    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.
  • Helpful post
    #17 6286905
    cyruss
    Level 31  
    Not 18-24V but only 20V, the original has "20V" marked on the sticker. If I can see correctly.
  • #18 6286921
    asziatko
    Level 21  
    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.
  • Helpful post
    #19 6287939
    jurek1980
    Level 26  
    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.
  • #20 6288147
    asziatko
    Level 21  
    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

    Quote:
    Mobile or desktop processor
    The design of the computer enables the use of both processors
    mobile and ordinary. To determine whether in a given model
    a mobile or regular processor is used, just check the power
    DC rating on the bottom of the power supply:
    ? Mobile: DC-Output 20V, 3.25A, 65W
    ? Plain: DC-Output 20 V, 4.5 A, 90 W


    and

    Quote:
    Power
    Model with a processor for a desktop computer
    ? Full-range AC adapter
    Input: 100-240V, 47 ~ 63Hz
    Output: 20V, 4.5A, 90W
    ? Supports lithium-ion smart battery
    Notebook processor model
    ? Full-range AC adapter
    Input: 100-240V, 47 ~ 63Hz
    Output: 20V, 3.25A, 65W
    ? Supports lithium-ion smart battery
    Pointers
    ? LED indicators (hard drive, power status, floppy drive, Num Lock mode,
    Caps Lock Mode, Scroll Lock Mode, Power Adapter, Battery Icon)
    Work environment
    ? Temperature
    ? Operating: 5 ° C ~ 35 ° C Operating relative humidity: 20% ~ 80%
    ? During shutdown: -20 ° C ~ 60 ° C During shutdown: 10% ~ 90%


    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?
  • Helpful post
    #21 6288871
    skaktus
    Level 37  
    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.
  • Helpful post
    #22 6288935
    tzok
    Moderator of Cars  
    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.
  • Helpful post
    #23 6289676
    skaktus
    Level 37  
    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.
  • #24 6289704
    asziatko
    Level 21  
    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?
  • Helpful post
    #25 6289764
    skaktus
    Level 37  
    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
  • #26 6289808
    asziatko
    Level 21  
    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.
  • #27 6289861
    tzok
    Moderator of Cars  
    skaktus wrote:
    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.
    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.
  • #28 6290112
    dzg4
    Level 30  
    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.
  • #29 6290121
    skaktus
    Level 37  
    asziatko wrote:
    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.


    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.



    Quote:
    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.


    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.
  • Helpful post
    #30 6290155
    dzg4
    Level 30  
    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.
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Topic summary

The discussion revolves around the compatibility of a replacement power supply for a laptop after the original one burned out. The original power supply had a current rating of 4.75A and a voltage of 20V, while the proposed replacement had a lower current rating of 3A. Participants emphasized the importance of matching both the voltage and current specifications, advising that the replacement must have a minimum of 4.75A and exactly 20V to avoid potential damage to the laptop. They also discussed the significance of checking voltage polarity and the risks associated with using lower-quality or unverified power supplies, particularly those from unknown manufacturers. The user was encouraged to seek a reliable replacement and consider local options for testing compatibility before purchase.
Summary generated by the language model.
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