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Dell Power Supply


I have plugged in y power suppy in my d505 latitude dell laptop but it doesnt seems to charge my battery
I put another battery from oter laptop and its the same problem
Please help!!


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  • shanky75 Jul 14, 2008


    I have a another laptop of the same make and the power supply

    seems to be working fine with the other laptop so I think there is nothing wrong with the power supply but something to do with the laptop itself but I am not sure wat to look for in the laptop




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You can test the power supply using a multimeter. I use a paper clip to get in the middle if my multimeter probe is too large. If there isn't any power but the light on the power brick is on (if there is one) then there is most likely a break in the cable. In any case turn to eBay for a replacement, should be quite easy and inexpensive to find. Or you could pay more and get one from Dell. Companies like APC and Targus make usniversal adapters but they're expensive and not optimal.

Posted on Jul 14, 2008

  • Richard C Cohen
    Richard C Cohen Oct 04, 2010

    Hello there...just a warning about Dell power supplies and laptop supplies in general...that center pin (at least in Dell) DOES NOT have significant current/voltage on it at all--that isn't what it's for!! The center pin in the connector is the battery-charge signal contact! It only will have 1 volt or some fraction thereof on it! It simply tells the circuit to begin charging the battery when necessary. When checking the presence of the charging voltage/current, you must BE CAREFUL not to touch the inside of the barrel to this pin!!! The inside metal barrel and outside is separated by a dielectric shield (insulator material) so the two never touch. Everyone thinks that the center pin is the positive--it isn't! Just have to emphasize because I'm trying to save someone from mistakenly blowing a good power supply. Yep, I'm a tech and I've BEEN THERE! The distances in that connector are SMALL so you really have to be on your game when troubleshooting.--Just trying to help out---



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