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发表于 2006-6-4 00:02:37| 字数 3,029| - 中国–广西–南宁 电信/广西交通职业技术学院
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Dell Inspiron Battery Problems - Solved!
Goldfish - God of Technology
That’s what my title should be.
On Saturday I went out to Marlow and did some wireless sniffing with Kismet, and once the battery was almost drained I switched my laptop off. A little later on I was going to show The Girlfriend the cool Slax based ‘LiveCD I made specifically for Wardriving, and went to turn the laptop on and all I got was a flashing orange and battery light, and when I pressed the status button on the battery itself I got three alternating lights. That’s weird.
When we got back home, I plugged in the laptop and the battery charge light blinked orange/red three times, then green - repeating that pattern. Totally weird. It appeared the battery wasn’t charging. Bugger.
On further inspection, it appears that sometimes Dell batteries decide that enough is enough, and that they need to stop working for the good of mankind - or some crap like that. Apparently there is some kind of counter in the battery which counts how many charges it has made, and presumabley once that reaches a certain number it just stops working. Sounds like a racket to me.
Solution? First, run the battery down completely. In Windows I don’t think this is possible, because it’ll try to shut the machine down before it gets to that point. There is probably a way to disable this, but to be honest I don’t care that much. In Linux, it’s easy. Just don’t install acpi support :p Or, stop it from loading somehow. If you can’t do that, boot a LiveCD which doesn’t support acpi power management. Make sure you’ve not got any ReiserFS or XFS partitions mounted (or they’ll crap out and you’ll need to do a fsck –rebuild-tree later….). Once it’s completely drained (you can tell because when you press the status button on the battery, nothing happens at all) - then comes the fun bit!
Get a plastic bag which can be air tight. Get one of those silica gel sachets you get with shoes and things like that. Get a hairdrier. Place battery and sachet into bag. Blow warm (not hot or you’ll melt the bag) air into the bag for a little while to ensure the bag is full of dry air. Close the bag, squeeze out most of the air, and tie the top so it’s air tight. Place into freezer for two hours or so. You could do this overnight to be sure.
Why the freezer? Because this will near enough stop the chemical reaction that happens in the cells, and allow the battery memory to reset (since there is no current whatsoever flowing, since there is no PD produced). Why the paranoia about dry air? Well, when you make things cold, they tend to condense the water in the air onto the surface. Condensation is a big no-no for anything electronic, especially something like a battery. If you have dry air then there is no water vapour in the surroundings, so when it’s cold, no condensation can form! Skillz!
Once it’s done chilling out in the freezer (har har), take it out and let it warm up *before opening the bag*. I can’t stress that enough. If you open the bag before it’s warmed up, you’ve completely negated the point of putting dry air in there, since the new air - and water vapour - will then condense on the surface of the still cold battery. To speed things up you can put the bag in a warm place, like an airing cupboard.
Once your battery is nice and toasty, pop it back into the laptop and give it a nice, full charge.
Problem SOLVED.
This procedure, by the way, should also work for other kinds of batteries, like phone batteries or Music player batteries, or camera batteries. |
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