Charging lap-top from cigarette lighter
Submitted: Monday, May 25, 2015 at 14:01
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Homebrewer
G'day all,
I am hoping to charge a lap-top from the cigarette lighter with a 90watt 19.5 volt car charger from Dick Smiths.
Is anyone using a car charger to charge their lap-top?
Has it been successful and does the car need to be running to charge?
Does it take any longer to charge using this method compared to the 240 volt charger?
Thanks in advance Pete.
Reply By: Member - Serendipity(WA) - Monday, May 25, 2015 at 18:54
Monday, May 25, 2015 at 18:54
I tried running my laptop from the Cigarette lighter when on a long trip years ago. Seem to work on the trip but when I got
home the laptop power pack was burnt out - probably from under supply of current. I was using a 150w 'pure sine wave' inverter.
Also tried an after market 12v plug direct to the laptop - burnt that out too. I think the laptop tried to pull too much power and it over heated the plug in the cigarette lighter and melted it. It is weird that the charger power pack on the laptop says 45w but I have been told it will draw a lot more than that. Not sure how this blue smoke trick works.
Now I have a 1500w 'pure sine wave' inverter that has 10mm cables no longer than 600mm direct to deep cycle batteries. Only problem is the touch mouse pad does not work with an ungrounded inverter connection meaning I can't use the laptop while charging. All is fine other wise.
Serendipity
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