My wife just had two laptop computers ruined using the 175 w mobile power inverter. One of the computers was almost new , but bought at circuit city, and they are going out of business. My wife is desperate because she has all her college info on the laptops. Why did this happen?
175 W inverter is not enough power for your computer and most of the cheap inverters do not put out a true sine wave. Buy one rated at least at 400w. Then it will output continuously at 300w. That should be sufficient for your computer. Your 175 w inverter is overtaxed then the voltage drops increasing amperage and burning things out.
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The output of this inverter (and most others) is a modified sine wave, which isn't quite the same as a true sine wave - like you get from a wall outlet. Unfortunately, most transformers (which is essentially what your laptop power-supply is) require a true sine-wave. Your inverter will work fine for many other 110V applications. You can buy an inverter with a true sine-wave output, but they are more expensive.
In order to get 230 volts out of any 115 volt inverters you would need to be able to hook the outputs up in series with each other. If your inverters have outlets there is no way to do this other than completely dismantling both units and then I wouldn't advise it. As a licensed electrcian and electronics tech I've sometime done things like that but only as experiments or in emergencies.
If your units came with a power(+) and ground(-) you could then hook them up in series by fastening the (+) from one unit to the (-) of the other, then tape them to insulate them. You should then show 230 volts from the two leads still available. On the battery side you will still hook both postives(+) to the positive(+) and both ground(-) to the negative(-).
* Depending on the internal wiring of your units the above description may not work and could damage or even ruin your inverters.
* Although you may get 230 volts this way you will not have more power(watts,Amps) than listed for one unit and you may even have less.
* You need to also beware this could VOID any warantees and shorten the life of these units.
One wire is the hot and the other wire is the ground.
To find which wire is the ground wire,Take a volt meter and set it on ohms,connect one of volt meters leads to case ground,take the other volt meters lead and touch it to one on the inverters wire,when the needle or digital read out advances or makes a buzzing sound, depending on the type of meter you use,that is the ground side. Black is usually ground and red hot.center connector for lighter socket is the hot side.
Not a great solution but makes sense.
the ac adaptor for your alienware probably says input 240V ac 1.5Amps whilst the inverter can output 175W= 240V ac at 0.73Amps.
I am surprised it actually worked, i had to buy a 300W inverter to run my laptop. would suggest you do the same.
inverter is probably toast now anyway.