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The ultimate battery question

post #1 of 8
Thread Starter 
Hey all

for once I'll give a simple question that i would really like to know.

1)When I connect my laptop (compac cq70) to a power outlet, and it charges to full, does the power source of my laptop switch AUTOMATICALLY to power source, or does it twiddle ab it with the battery, and keeps it recharging while the laptop keeps running of battery (I think that this wouldnt be pretty good for the battery itself). Or should I best take out my battery while charging.

I've heard many different opinions about this.

BTW: once it said that (even when the battery was full) it ran from the power outlet because I was making a recovery disk.
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post #2 of 8
if you're plugged in, it should be using the outlet as the power source, and not the battery, regardless of the battery's charge state.
Edited by ryboto - 12/19/08 at 7:32am
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post #3 of 8
Once you plug in the ac adapter, your laptop runs entirely off of ac.
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post #4 of 8
It goes through your battery (cord-> battery->lappy) and recharge it as it runs.

If you use your lappy at home very much and don't unplug the cord (taking the lappy with you) then it's best if youtake out the battery for saving it's life length.
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post #5 of 8
Thread Starter 
So you 2 say that the laptop runs entirely off AC, but ecchi says it runs through the laptop and thus choses the last option.

Is someone actually sure?

Does it run entirely from AC when fully charged or from/through battery?
Because i really don't think that the second option is good for the battery
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post #6 of 8
Thread Starter 
Sorry for the double post
Anyone has an idea how it really goes to work?
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post #7 of 8
Quote:
Originally Posted by Ecchi-BANZAII!!! View Post
It goes through your battery (cord-> battery->lappy) and recharge it as it runs.
That is just wrong. First when running on AC notebook gets priority over charging batt. Not usually an issue if powerbrick has proper wattage.

Quote:
If you use your lappy at home very much and don't unplug the cord (taking the lappy with you) then it's best if youtake out the battery for saving it's life length.
If cord-> battery->lappy is correct and you removed batt you would have cord-> ........ ->lappy so clearly wrong.

Assuming power brick has enough wattage the battery will charge up to a set voltage then stop charging until battery falls below a set voltage. Two ways to drop the voltage, use the battery or the natural leakage all batteries suffer from. So no your battery is not constantly charging.

Don't you have an Icon in system tray that shows if plugged in and if charging (mouse over and will give more info)? If it was run from the battery when plugged in you would see it in a constant state of charge, and you don't. ecchi is just incorrect on this one.

ecchi has a point on removing even though I do not do. Does not concern me and the way I use my notebook. Heat does accelerate the loss of ability to hold a charge. Note accelerate not cause. Li-ion have a limited lifespan regardless of what you do. Storing 40% to 50% charge in a cool place (even fridge) will maximize life but you can't make use of? If you use you battery twice a week I think you would lose all real benefit and a big hassle. Battery's also have a limited number of cycles (full charge discharge) for notebooks typically rated 300-500 depending on battery.

As two posters said above, when plugged in it runs off cord not battery that is it.

Li-ion battery's start wearing from the day they are manufactured regardless of what you do, no ifs ands or buts. That is fact not up for debate. You can slow or increase this wear. Some things that increase are using it. So my advice to most is relax and just use it. 2-3 years is normal (I know some get less others get more) if it wears out buy a new one.

Hope this helps llama.
Edited by Asus Mobile - 12/21/08 at 10:35am
    
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post #8 of 8
Thread Starter 
Fiew that is a very nice answer of which I am pretty sure that it is the correct one.
thanks you for this

+1 REP

You saw yourself that it ws hard to find a correct answer, there where lots of different opinions.

I will let the battery in, that's alot of pain I don't need to worry about anymore. I'll keep it in, but watch it's temperature because I noticed it tends to get warm because it is placed between the heat exhaust/cpu

Thanks alot again
Sorry I had to push to get an answer
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My beloved system
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CPUMotherboardGraphicsRAM
Q6600 @ 3.4 (1.4V) GA-P35-DS3 MSI Twin Frozr II/OC GTX560 Ti 2GB OCZ DDR2 800Mhz 
Hard DriveOptical DriveOSMonitor
80GB raptor + 160GB SG + 500GB SG DL Super Writemaster Vista Home 32bit 226BW SyncMaster Samsung 22" 
KeyboardPowerCaseMouse
Logitech 650W Be Quiet! Antec P180 G5 Laser Mouse v2 
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