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dell 9300 battery 6 cell wear?

post #1 of 11
3/27/06 at 7:30am
Thread Starter 
this laptop is ony 4months old and the battery says wear level 19% on notebook hardware controll.

is this normal?

i dont use the battery that much maybee a couple times in a week.

and i allways run down the battery till the laptop turns off than leave it charge way back too 100% problee 2 too 3 times sence i had it.

and i just check my compaq 700us battery with this notebook controll and it says wear level 95% and the battery ony lasts 10mins so this is pretty normal sence i had the laptop for over 3years.

so is the software right?
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post #2 of 11
3/27/06 at 7:35am
I am not sure you want to use the battery until the laptop dies. I would charge it when it needs it.

How does it compare with when you first bought it? If it still lasts about the same time, I would not worry about it. That is all that really matters, not what NHC says.
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post #3 of 11
3/27/06 at 8:27am
Thread Starter 
i tested it while runing the wireless card and full speed and the video card was on full speed and watching a avi movie that is networked over on my desktop hardrive and i had the screen on allmost full.

and it lasted about 1hr and 20mins.

is that about right??

allmost forgot too add befor the movie notebook controll said it was 17%.

than after the movie it was 19% wear level.
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post #4 of 11
3/27/06 at 11:48am
Everytime you let a lithium ion battery run until it dies, you damage the battery. Don't do that.

Whenever I use my laptop on battery (not very often), I always make sure to top it up at my first opportunity.
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post #5 of 11
3/27/06 at 1:54pm
http://www.batteryuniversity.com/parttwo-34.htm

A lithium-ion battery provides 300-500 discharge/charge cycles. The battery prefers a partial rather than a full discharge. Frequent full discharges should be avoided when possible. Instead, charge the battery more often or use a larger battery. There is no concern of memory when applying unscheduled charges.

Although lithium-ion is memory-free in terms of performance deterioration, batteries with fuel gauges exhibit what engineers refer to as "digital memory". Here is the reason: Short discharges with subsequent recharges do not provide the periodic calibration needed to synchronize the fuel gauge with the battery's state-of-charge. A deliberate full discharge and recharge every 30 charges corrects this problem. Letting the battery run down to the cut-off point in the equipment will do this. If ignored, the fuel gauge will become increasingly less accurate.
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post #6 of 11
3/27/06 at 3:22pm
Thread Starter 
hmm i allways herd and thought its allways too give the battery a full discharge about every month or 3months.

so its safe too leave the battery go down too like 50 too 30% than charge it back up again?

so dont never do the full discharge again?

oh and how much battery juice does the wireless card chugs up?

because thats problee why it ony lasted 1hr and 20min.

and just check dell partition utitly and did a battery test it passed fine but says 2 percent error in battery data.

so i ony lost 2 percent?
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post #7 of 11
3/27/06 at 3:45pm
Quote:
Originally Posted by Turkish
Everytime you let a lithium ion battery run until it dies, you damage the battery. Don't do that.

Whenever I use my laptop on battery (not very often), I always make sure to top it up at my first opportunity.
why does the manual reccomend to calibrate it every so often (run the notebook on battery till it dies completely without using the notebook during that time) if its just doing damage?
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post #8 of 11
3/28/06 at 9:44am
Thread Starter 
just bumping it up
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post #9 of 11
3/28/06 at 4:30pm
Quote:
Originally Posted by eminem3150
why does the manual reccomend to calibrate it every so often (run the notebook on battery till it dies completely without using the notebook during that time) if its just doing damage?
Because they want you to buy new batteries!

Seriously, though, the performance of a Li-Ion battery will degrade over time no matter how well you take care of it. Methods for measuring this effect are horribly inaccurate, so it's best not to worry. When your notebook will no longer stay on as long as you need it to, get a new battery (or do what I do and just get a new laptop! ).
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post #10 of 11
3/28/06 at 4:49pm
Quote:
Originally Posted by gordesky1
hmm i allways herd and thought its allways too give the battery a full discharge about every month or 3months.
This may have been true with NiCad (Nickel-Cadmiun) batteries to avoid the "memory" effect. Newer NiMH (Nickel Metal-Hydride) and Lithium-Ion batteries, while they can suffer from "memory" effects, it's to a much lesser extent that it's almost never a problem within the batteries normal lifetime.
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post #11 of 11
4/12/06 at 11:25pm
I know this thread is old but I've got a similar problem. My 9300 9-Cell battery always stays at 99% and is always charging, its only been this way about a week. What does this mean, that I need to completely discharge my battery once to recalibrate the internal battery meter?
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