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using lower Ampere charger

  • 21-02-2014 7:39pm
    #1
    jsabina
    Registered Users, Registered Users 2 Posts: 742 ✭✭✭


    Hi everybody,
    I have a lenovo T410 thinkpad, 2nd hand.
    It came with a non-original charger with the specs:

    Input 100-240V - 50/60Hz
    Output: 20V - 4.5A

    unfortunately is not working anymore.
    I have a charger for lenovo thinkpad T430 and tried to connect it's working.
    It gave a message that has a lower power and it's

    Input: 100-240V - 50/60Hz
    Output: 20V - 3.25A

    It is working and it's charging.
    But am I doing anything bad to the laptop? is it dangerous?

    thanks


Comments

  • #2
    bonzodog2
    Registered Users, Registered Users 2 Posts: 6,253 ✭✭✭bonzodog2


    Check the official power specs online, but should be OK, not likely to damage the laptop. Maybe avoid using the optical drive, and lower the screen brightness if you can to reduce consumption. Keep an eye on the power adapter too in case it starts getting stupidly hot (they all get pretty warm)


  • #3
    Capt'n Midnight
    Moderators, Recreation & Hobbies Moderators, Science, Health & Environment Moderators, Technology & Internet Moderators Posts: 92,550 Mod ✭✭✭✭Capt'n Midnight


    A charger is designed to power a laptop and charge the battery at the same time.

    So as long as you aren't doing both at the same time then a slightly lower rated power supply should be fine.


    If however your is flat then you may have to let it charge a bit before you can turn on the laptop as the PSU on it's own may not have enough umph.

    If the laptop gave a warning about the psu then it's likely (depending on the message) that it's OK and may go into a lower power mode to compensate.


  • #4
    jsabina
    Registered Users, Registered Users 2 Posts: 742 ✭✭✭jsabina


    Yes I am using it charging the battery and using the laptop without AC attached.
    The initial message is that the computer performance will be adapted to the power.
    So I suppose it should not be a problem.

    Thanks!


  • #5
    FSL
    Registered Users, Registered Users 2 Posts: 1,456 ✭✭✭FSL


    The original charger is 90 Watt the replacement is 65 Watt so it will take approximately 50% longer to charge the battery. The output voltage is the same, the amperage is lower so it won't cause any damage.


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