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Table pc in car, voltage?

  • 11-09-2007 12:37am
    #1
    pyrogenx
    Closed Accounts Posts: 832 ✭✭✭


    Sorry if i posted in the wrong place.

    I've got a Compaq tablet pc, basically functions as a laptop. I want to be able to charge it in the car. The "laptop" takes an input of 18.5 volts and the nearest converter i can find has an output of 18 volts. I wonder if that half of a volt will make a difference or could the internal laptop PSU burn out eventually under the constrain?

    Cheerz


Comments

  • #2
    Tom Dunne
    Registered Users, Registered Users 2 Posts: 23,212 ✭✭✭✭Tom Dunne


    pyrogenx wrote:
    Sorry if i posted in the wrong place.

    I've got a Compaq tablet pc, basically functions as a laptop. I want to be able to charge it in the car. The "laptop" takes an input of 18.5 volts and the nearest converter i can find has an output of 18 volts. I wonder if that half of a volt will make a difference or could the internal laptop PSU burn out eventually under the constrain?

    Cheerz

    I wouldn't chance it. Also, I think the current is more important than the voltage, so if the current rating is much higher than the tablet can handle, you will most likely do some damage.


  • #3
    Sam Vimes
    Registered Users, Registered Users 2 Posts: 21,611 ✭✭✭✭Sam Vimes


    It doesn't work like that tom. The device will only take as much current as it needs. As long as the charger can supply the required current or greater its fine

    as for the voltage, i wouldn't risk it either


  • #4
    Flying
    Closed Accounts Posts: 636 ✭✭✭Flying


    Hav you tried using an inverter, I got a Cheap one on Ebay with USB also for 11 squid and works perfectly with my laptop,kettle etc ;) and oh the little tv aswell in case I need it


  • #5
    Sam Vimes
    Registered Users, Registered Users 2 Posts: 21,611 ✭✭✭✭Sam Vimes


    Flying wrote:
    Hav you tried using an inverter, I got a Cheap one on Ebay with USB also for 11 squid and works perfectly with my laptop,kettle etc ;) and oh the little tv aswell in case I need it
    yeah i was going to recommend one of those but they usually don't supply much current. But if its enough for your laptop it should do his tablet. Make sure to check the current rating of course


  • #6
    Flying
    Closed Accounts Posts: 636 ✭✭✭Flying


    Argos do them from €40+


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  • #7
    Tom Dunne
    Registered Users, Registered Users 2 Posts: 23,212 ✭✭✭✭Tom Dunne


    Commander Vimes wrote:
    It doesn't work like that tom. The device will only take as much current as it needs. As long as the charger can supply the required current or greater its fine

    Well there you go. You learn something new every day. :)


  • #8
    pyrogenx
    Closed Accounts Posts: 832 ✭✭✭pyrogenx


    I did consider using an inverter, but there is couple of problems with that. The original charger for the tablet isn't working anymore and i don't think i can provide the inverter with enough constant amps, as i've already got a lot power being used in the car by other devices. Its probably incignificant, but there quite a bit of power wasted by bringing up from 12V to 230V, then the tablet charger brings it back down again to 18.5V.

    An inverter would be pretty cool though to power something like a full PC in the car =]


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