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  1. Join Date
    Oct 2002
    Posts
    19,435
    #21
    Quote Originally Posted by kinyo View Post
    18.5 x 3.5 = 64.75 watts

    with typical adaptor efficiency at 80%, your laptop would require some 80 watts of AC power ... a 100 watt inverter should be sufficient and a 300 watter should have no problem

    just be carefull using the lighter socket as this is usually protected by a 15A fuse, which means you can only extract at most 12 x 15 = 180 watts from it
    Sa output pala kinukuha ang power requirement?

  2. Join Date
    Dec 2003
    Posts
    11,317
    #22
    one gadget at a time lang to be sure...

    if may 3 12V sockets ang pajero same sa outie, 2 inverters bilhin, 1 under the dash, 1 on the mid console box

  3. Join Date
    Oct 2002
    Posts
    19,435
    #23
    One at a time lang naman ang pag gamit ko kung sakali. Basta kaya ang laptop.

    Yung sa mid console box, parang hindi practical ang pagkalagay ng socket dun. E puno na ng mga abubot ko yun e, so natabunan na yung socket.

  4. Join Date
    Dec 2003
    Posts
    11,317
    #24
    hmm di kaya mas baba ang load pag charging lang ng battery ng laptop..kaya kung charging baka kayang kaya yan + cellphone charging...

    wag lang actual use ng laptop siguro..

  5. Join Date
    Jul 2007
    Posts
    88
    #25
    Quote Originally Posted by BlueBimmer View Post
    hmm di kaya mas baba ang load pag charging lang ng battery ng laptop..kaya kung charging baka kayang kaya yan + cellphone charging...

    wag lang actual use ng laptop siguro..
    Kayang-kaya yun Sir kung charge lang ng Laptop at fone sa 120 Watts na Inverter, ang talagang magiging problema mo is ung outlet nung Car Cigar kc nga 15 watts lang yun, pero sa 120 Watts na Inverter kaya na Laptop nun.

    Ako meron 700 Watts kya lang 120Volts ung output kc galing US pero npa-reliable full of protection nag-sshutt off sya pag Low voltage at nag-aalarm, nagamit ko ito nung nag-block out ng matagal, lahat kapit bahay namin nag-pacharge ng fone kahit 8 na charger kayang-kaya haha! basta rekta na sa Car Battery.

  6. Join Date
    Dec 2005
    Posts
    608
    #26
    This is what I am using:

    Ifonix Power Inverter 600W
    6K * DIY
    instead of buying a gen set, ito na lang gamit ko to power a TV and 3 electric fan and emergency light in case of brownout.

  7. Join Date
    Oct 2002
    Posts
    2,703
    #27
    Quote Originally Posted by boybi View Post
    Sa output pala kinukuha ang power requirement?
    for your laptop's case, yes ... it is the adaptor's power output that indicates how much power you will need for the laptop, or any device with an adaptor, and given that efficiency for such adaptor (a switching-mode power supply) is around 80% or better, you'll have a good idea on actual power needed from the AC line

    there are switch-mode power supplies designed primarily for laptops which can deliver 18.5V DC (up to 90 watts) from a 12V input that are commercially available, although difficult to find

  8. Join Date
    Oct 2002
    Posts
    3,790
    #28
    Quote Originally Posted by kinyo View Post
    18.5 x 3.5 = 64.75 watts
    you were computing the output of the laptop charger...shouldn't you be computing the input power requirements instead kasi yun un higop niya ng koryente?

  9. Join Date
    Feb 2007
    Posts
    89
    #29
    Quote Originally Posted by boybi View Post
    Parang ganito sya:



    Yan ang gusto ko para mas handy and wala ng wires.
    Ganda nito. San ito nabibili and how much?

  10. Join Date
    Oct 2002
    Posts
    2,703
    #30
    Quote Originally Posted by wildthing View Post
    you were computing the output of the laptop charger...shouldn't you be computing the input power requirements instead kasi yun un higop niya ng koryente?
    there is no clear data to compute input power ... so using the output power to estimate the input power is the best we can do

    the specs for input "Input: 100-240V 50-60Hz 1.6A" do not clearly state the power consumed by the adaptor, it merely says that it can be used worldwide and its current consumption is at maximum 1.6A (presumably at 100VAC as these devices are constant power devices, i.e., they use the same amount of power regardless of input voltage, much unlike resistive loads) ... the maximum 1.6A cannot be used reliably to estimate the input power as this figure usually represents transient current, not average current

    some laptop adaptors clearly indicate required power and i've never seen one that needed more than 100 watts ... 80-90 watts are most common

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