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Looking for people's Theoris on Battery Charging

post #1 of 18
6/22/06 at 5:38pm
Thread Starter 
I use my 5672 as my main computer. It's sitting on my desk and it is on all the time. I am usually close to an outlet and I have it plugged in running on AC power all the time. While it's plugged in I presume my batter is charging and such. Does this hurt my battery? Should I take the battery out if I am running on AC power all day?

How do you people use your laptop?

Thanks...
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post #2 of 18
6/24/06 at 12:19am
Ya, you will cook your battery if you leave it in the computer charging at a 100% charged level.
The rule of thumb so to speak that I've heard is that once it's 100% charged, you don't want to leave it plugged in for more than 8 hours.

I'd recommend either taking it out, or just cycle between plugged in and not.

If you decide to store the battery out of the laptop for a while, I've heard it's best to store it at a 50% charge level, as opposed to 0 or 100%.
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post #3 of 18
7/8/06 at 4:23am
no,, it doesnt hurt the battery, when your battery is fully charged it will automaticly swap to strait to the ac adapter.
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post #4 of 18
7/9/06 at 11:46am
Well...which is it? Bad or not? I use mine on AC most of the time, as well. This is mainly due to the fact that I get such pitiful battery life from my 5672. I can't quite get 2 hours out of it...and that's with a pretty minor load (websurfing, e-mail, word processing...)

It'd be a pain to take the battery out all the time... must I?

Thanks for further clarification!
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post #5 of 18
7/9/06 at 12:35pm
It's not bad to leave the battery in the machine all the time.
The charger has a voltage regulator built in which stops charging the battery when it reaches full charge.
Notice when you plug the laptop in ,and the battery is low,that the charger will be very warm for a couple of hours,then it'll cool off when the battery is fully charged.
It will stay a little warm while powering the laptop,but not "hot" like when charging the battery.
The charge indicator light on the front of the machine does what it's name implies-mine's yellow while charging,green when fully charged.
Acer,nor any other laptop manufacturer, expects you to have to pull the battery out of the machine to keep from toasting it.
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post #6 of 18
7/10/06 at 5:59am
Clogdog, wireless and duo core going to suck battery fast although there is some software fix on microsoft, just cant remember off top of my head what the link wouldbe. I'd say call Acer to see what normal Bat life for that is suppose to be, some range 1-5 hours depending on computer.
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post #7 of 18
7/11/06 at 7:42am
try do install this patchs..

WindowsXP-KB896256-v3-x86.exe
WindowsXP-KB918005-v2-x86-EN.exe
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post #8 of 18
7/11/06 at 8:32am
this ain't 1995 anymore... you can leave it plugged in w/o worries

always a good idea to unplug and run the battery down from time to time though
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post #9 of 18
7/11/06 at 10:11am
Quote:
Originally Posted by SMP_Homer
this ain't 1995 anymore... you can leave it plugged in w/o worries

always a good idea to unplug and run the battery down from time to time though


You have just contradicted yourself there, if you can leave it in w/o worries as you say, there surely would be no need to run the battery down?


I personally feel and can say from past experience, if you leave you battery plugged into the mains all the time, you will ruin the battery, and as battery often have a shorter warranty period then the products they are designed for this is not a good idea.
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post #10 of 18
7/12/06 at 10:03am
Quote:
Originally Posted by robodan
You have just contradicted yourself there, if you can leave it in w/o worries as you say, there surely would be no need to run the battery down?

I don't see a contradiction... there is nothing to worry about, but it is a good idea to use the battery for what it's purpose is!
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post #11 of 18
7/12/06 at 10:23am
Quote:
Originally Posted by robodan
You have just contradicted yourself there, if you can leave it in w/o worries as you say, there surely would be no need to run the battery down?

Running the battery down from time to time is not for the sake of the battery. It is for the sake of calibrating the sensor. If you don't use any of the low-battery notifications and wait for the machine to forcefully turn off on you, then running down the battery does nothing for you.

I would be very surprised if leaving the AC adapter plugged in is bad for the battery. However, what is bad for the battery is heat (will ruin the battery's lifetime), and if you take out the battery when you run on AC, you subject it to a lot less heat and may prolong its lifetime.
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post #12 of 18
7/15/06 at 9:02pm

running battery down in first use

Hello people, I´m a first poster here, my 5672 laptop is due to come next week from USA (i´m brazilian).

When I got my first notebook, which was a PCCHIPS A535 (dead), I had it turned on in first use until battery ran down, as I thought if I didnt do that I would face a battery memory problem (?).

I used that laptop for 7 months and battery always went on fairly to the maximum time as announced...

But now, reading these posts here I thought I should ask you: is it necessary to run the battery down for the first time using it?

Sorry about english mistakes.

Melo
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post #13 of 18
7/20/06 at 10:34pm
No it's not necessary with the Lithium-ion batteries

The old Ni-Cads did however develop a "memory" ,and if not conditioned properly would not utilize the battery's full potential.
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post #14 of 18
7/20/06 at 10:35pm

From our very own Notebookforums Guides section...

http://www.notebookforums.com/post10...ml#post1027821
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post #15 of 18
8/11/06 at 9:11am
Don't know if I agree with you that it's safe to let the laptop remain plugged in at 100% charge rate.. I have done this a few times and I allways saw a large increase in the wear level.

For example: This tuesday I left the laptop (F4005) in the charger while I went traveling - here the wear level was 31%. I plugged out the laptop this friday morning and now the wear level is 41%!..

It could be that my particular ferrari 4005 does not automatically stop charging of the battery - but to be on the safe side - never run your laptop on A/C when the battery is in and at 100%!!

/Wombatten
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post #16 of 18
8/11/06 at 11:43pm

Care and feeding of Lithium ION batteries

Fact: The main enemy of a Lithium ION battery is internal heat. This is caused by rapid charging, rapid discharge, and defective (or non-existent) thermal monitoring.

With that said, any time you discharge or charge a Lithium ION battery, you reduce it's life. A slow charge is preferred, as is a temperature controlled charge. Most notebooks have a thermal monitor and a charge controller to avoid battery damage (it is in the notebook, not the power adapter). Some third party batteries substitute a resistor for the thermal sensor, thus bypassing the protective thermal monitor circuit (the resistor is pennies cheaper - those adapters that we pay $50 to $100 for really cost less than $10 to produce).

So, leaving your battery topped up is the best, removing it from the notebook is ok, but not really needed (and in many cases, will reduce the life due to self discharge).

Oh yes, this is factual - I worked in the industry for many years (electronics engineer in the power field) and specifically for one of the largest power supply manufacturers in the world (multiple China and European factories to the tune of over 2 million power supplies and battery chargers a week).

Wayne
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post #17 of 18
8/12/06 at 12:12am
Thanks for the info, man!
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post #18 of 18
8/15/06 at 4:28am
wayne_i>

Well maybe I've been doing it all wrong.... What you're saying is actually making sense... My battery has definately been through a lot of discharge/charge cycles, as I have been trying not to run the machine on A/C when not charging the battery.

I found out that the large increase in wear level was partly due to a calibration error: After draining the battery completely (running it on battery in the BIOS screen until shutdown) it now says that the battery wear level is 38%

/wombatten
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