Since that of school project, I'd like to make my pc runs without power supplies and power cord. I'd like to use battery instead. Is there a way to do that?
-Cost doesn't matter much..-
Thanks.

Sure, buy a laptop. Or a UPS. Or, if cost is really no barrier, purchase one of the tuned magnetic field power transmission prototypes. (Around $1,000,000.00, I believe, if you can get it.)

If you had VIA/Geode hardware and maybe a flash drive instead of a hard drive, you probably could get away with using a battery pack. But otherwise, no, it'd be pretty damned hard. Keep your power cords and be happy you don't have to buy 400 AA batteries every week. =/

Three hamster wheels in serial should get you going.

Seriously, though. Buy a powerful UPS, strip it, and install the components inside your computer chassis. Might need a bigger chassis to make this work. Of course, you'd have to periodically plug it in to charge.

May I ask what the premise of this project is?

Build a cart containing a car battery and a 1000 watt power inverter. This will run the computer for a while, until the battery dies.

Somebody already did something like that:

http://www.ecnmag.com/article.aspx?i...ection=effzone

Just get one of those 200-amp car batteries and wire it to your mobo. No warranty.

*Rofl* XD

Anyway, if you want a really good awnser why not ask Slashdot? They'll come up with some serious solution XD Seriously, some peoples brains there have no bounderies.

There are 12VDC input ATX style power supplies instead of adding the extra complexity of an inverter.

I didn't know this. That's the most sensible idea yet but still, too bad car batteries are so 'nasty' and heavy, etc..

Thanks for your help.
My project is actually to build airplane that simulates real environment of the flights that can operate and fly like normal plane in small scale. There is no screen however according to my plan, since it would be controlled by remote control PC. The problem lies with the battery: the battery has to be supplied in order to make airplane's computer alive. I was asking for if the battery for PC has existed (not laptop, I need really powerful PC for this project for it requires a lots of CPU works...) and it turned out that it existed. However, is there any not-so-heavy battery? I am just wondering if there is any better chocie than car battery.
Thanks.

As long as there are batteries, there's the weight problem, as you're surely aware. And different combinations of batteries are still going to be heavy.
You could use 2 lantern batteries in series (wouldn't last long) or two motorcycle batteries in series (would last longer, and be heavy again) or.. A whole whack of D-cells (groups of 8 give 12 volts; connect a bunch of these 'groups of 8' in parallel, for power/longevity, but again, now it's heavy)..

Hmmmm..

Thanks for all of you. I really appreciate. I now looked at my country's eBay shopping mall, which has the things that all of you mentioned. I really appreciate.

And best of all.. I'm all busy playing with creating my own version of Fedora... (iqua.sourceforge.net)

anyway.. Really thank you!

Excellent, good luck with the project.
For what it's worth, here's another idea: Depending on the size of this airplane, and what sort of motor or engine is in it, is there room for an alternator or generator of any sort? whether a small automotive type from a honda or a motorcycle (do motorcycles have alternators?) or even one of those things they put on bicycles to power the safety lighting though I don't know how much power they put out, probably not 12 volts, but I don't know.
Anyway, if you could manage this, it would keep the batteries charged for a much longer period of time, as the computer would theoretically be running off of the alternator/generator.

Best of luck with the project anyhow; let us know how it progresses!

As already posted there is going to be a weight/performance issue. Without knowing the details this sounds like a very complex project and I hope this is going to be a team effort. Your probably not going to be able to install a regular desktop PC in an airplane. I would look into embedded single board computers that do not require much current.

Good luck, It is against the rules of the forum to help with homework but we can provide direction if asking specific questions as long as you at least attempt to show some effort on your part.