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Discussion Starter #1
I bought a high capacity battery in the middle of January for my Compaq V2000 laptop. It worked great until yesterday.....where when I had it plugged in for quite a while, and pulled the power cord, the laptop died immediately. Today, it's cycling between 'charging' and 'AC power'.....when on charging it says 6% remaining. If I pull the power cord, the laptop dies immediately. I put my normal battery back in and that one charges up properly.

Do laptop batteries just go bad like this? I'm a bit distraught, as I love my high capacity 12 cell battery.......5+ hour battery life is important to me :(

Any help is appreciated.

Thanks,
Rob
 

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Yup, they do go bad 'just like that'.

On the other hand, it could be the internal power supplies in the laptop not charging the battery properly.
 

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Discussion Starter #3
Ummmmm, the battery the laptop came with seems to charge just fine.
 

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Avenger, do you normally keep the battery charging alll the time? Did you ever fully charge it when you first got it, let it completely cycle and drain out once, then fully charge it another time and such? Just wondering. The first and second charges or so help set the memory right. Even though it should be set from factory. Usually not touchy like nimh is.

Also, I'm wondering if it isn't the battery cells itself but perhaps the charging circuit on the battery that is sending out a bad signal getting it to not charge properly. Definately sounds like a defective unit.
 

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This seems to be happening a bit more often these days!

One of my friend's laptops has the same problem. Inside every LiIon battery pack there is a small charge controller and a thermal fuse, if either of these fail the battery will suddenly go dead.

It's really a damn shame that a 25 cent part can bring down a $200 battery.

Batteries dont usually suddenly fail, they lose capacity over time. So, naturally this phenomenon is quite alarming to me. I hope they become more reliable soon.


EDIT: Wait a sec! You said you had a Compaq? My friend's is an HP! Now that the companies are the same, I wonder if these incidences are related?

What are the specs of your machine? I wonder if the batteries are similar?
 

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Discussion Starter #6
This is an aftermarket 12 cell battery......I don't think it's made by Compaq/HP.
 

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The thermal/charge controller and fuse is necessary because of the explosive and toxicity of LiIon battery technology..........
 

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[QUOTE='98-ESer]The thermal/charge controller and fuse is necessary because of the explosive and poisoness nature of LiIon battery technology..........[/QUOTE]

Yeah I know. The NiCd and NiMh batteries also have a thermal fuse to keep them from blowing up if they get too hot but they aren't as volatile as LiIon, so they don't have a charge controller in the pack itself.

LiIon is scary stuff! Metallic lithium (as opposed to Li salts) plus flammable liquid (usually kerosene or similar) inside = OH CRAP if something goes wrong.

A few LiIon batteries DID have a problem with fires...
 
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