Dell Vostro 1700 battery

I have a Dell Latitude D505. I have recently installed Ubuntu 8.04, and removed Windows XP. Here is my problem, along with steps I have taken trying to fix it:

-Before the switch, my DC outlet in the computer was going bad, so I had to wiggle the power plug to make it power the computer/charge the battery.

-I had the DC outlet replaced, so I no longer had to wiggle the power plug.

-Then, after the switch, the AC adapter powered the computer fine, but would not charge the Dell Vostro 1700 battery.

-I sent the computer back to the guy who replaced the DC outlet. He checked that the DC outlet was in properly, and then switched out my hard drive for one with Windows on it to check some other things because he doesn't know how to use Ubuntu.

-He gave me a new AC adapter to try. The battery had charged to 55% when I got it back, so I assumed it was working. But, it will not charge past 55%, and now I've had it unplugged a little, and it's down to 52% and not charging. The LED light on the system that indicates that the battery is charging is not showing, even though in the top right of the desktop, it says the battery is charging (it just won't go past 52%, and the remaining time is unknown).

-When I boot up the system, I get a warning message that the AC Power Adapter type cannot be determined. The computer runs fine off of AC, and fine off of battery, but the Dell XPS M1210 battery just will not charge.

Here's what I've determined. The battery charged while the guy had the Windows hard drive in, getting it up to 55%. It won't charge with my hard drive with Ubuntu. So, it seems like the problem is Ubuntu-related.

When I look at the battery device information, it says that the charge is 52%, the capacity is 67% (poor) (so, I need a new battery soon, but I don't want to get a new one until I can figure out how to charge it).

Yeah, it would make sense if it was either a battery or even a motherboard issue, since I've had problems before in that area. The only thing that made me think it was either hard drive or Ubuntu related was that it charged for the guy yesterday when he had the other hard drive in. I'm fairly certain it's not charging when powered off, though I'll check to be sure. So, if this eliminates Ubuntu as a source, then I'm not sure what the problem is...though I wouldn't be surprised if it is in fact a Dell XPS M1310 battery or motherboard issue, and there is some other reason it charged with a different, sans-Ubuntu, hard drive. If anyone has any other ideas, I'd be glad to hear them.

It's not Ubuntu, it's most likely the battery or something else hardware related. I had almost the same thing, on my Latitude D520. It would never charge all the way on Ubuntu, but it would say fully charged on Windows XP.

After a few weeks though, I noticed the maximum battery charge displayed on Ubuntu(it's 9.10 by the way) was steadily declining, but at the same time, XP said that it was holding a normal charge. Eventually, the battery could no longer hold a charge at all, so I had to order a new one from Dell.

So it's probably a battery problem, likely because it's old or (the previous owner?) bought one of those cheap Dell-imitation batteries of the net. Just order a new battery FROM DELL(trust me on this, don't buy them anywhere else, they don't seem to have as long of a Dell XPS M1330 battery life, and die quickly), and boot into Ubuntu with it the new battery and AC plug in. After a while, unplug the battery to check its charge or press Fn F3(that will display the basics of the current battery status battery on most Latitudes laptops)