Power adapters for laptops

Hi,

I have a Lenovo G530 laptop, and the power adapter broke. I could fix it by soldering, but it's really tight in there. If it doesn't work, I am considering buying a generic adapter to use.

Currently, I am borrowing a Kensington Universal 70W AC/DC power adapter, and everything is running fine. The original power adapter for this laptop is rated for 65W, with 19V and 3.42A.

I found an adapter that is quite cheap online, and I'm wondering if it will fry my laptop. It is rated at 90W. I'm a bit worried about whether or not it's gonna fry my computer. Are these like desktop power supplies where everything will be nice and rosy even though you have a higher wattage than you need on your power supply?

Trust 90W Notebook Power Adapter Express

If anybody has any other suggestions about which power adapter to get, I'd greatly appreciate it too. It doesn't have to be from France (since I actually live in Canada, and I'm only here for the summer.

 

The only thing that matters is that the voltage and polarity are identical,the higher the wattage the more headroom the power supply has just like desktop PSU's and will generally run cooler and smoother until it reaches its limit.

The one drawback of a higher wattage PSU is if there is a problem with the power supply,its connection or the laptop the higher current can cause more damage before you can turn it off or any safety measures kick in.

Just as an added piece of advice don't skimp too much on your laptop power supply,a bad one will kill a laptop just as dead as a desktop,saying that I would never buy an original manufacturers laptop power supply they are just too expensive,just as with desktop PSU's go for higher quality rather that higher wattage.

 

So, if I understand correctly, you are saying that the amperage of the power supply will adjust itself to fit the needs of whatever load I'm putting on the computer at the moment?

I did choose the power supply because it looked like it had higher headroom, but the main reason for choosing it was because it was cheap. LOL

The only thing that worries me is that I don't see any reviews on the page. However, I did some googling, and Trust seems to have a pretty extensive website. I think I can trust them.

I'm gonna go out to do some real life shopping today, and I'll see what I can find.

 

Yes the computer will only draw as much current 'amps' as it needs,the power supply doesn't really have any choice in the matter,it will keep giving as much current as it can until it either blows up or safety features engage.

Trust make some decent stuff as far I'm concerned but personally I would aim for 65watt higher quality supply but I'm splitting hairs a little.

EDIT whichever you end up choosing during a high usage period on your laptop feel the PSU's temperature with your hand,it should never be hotter than luke warm.

 

Well, this is mostly a work laptop. I shouldn't be doing much more than web surfing and programming with it. The most advanced game I'll probably be playing with this computer would probably be Starcraft anyway (not Starcraft 2) so it shouldn't be that much of a concern.

Thanks for your help.