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The battery on my laptop is dying, and generally only has a 25-minute lifespan compared to hours when new.

Does this have any effect on my laptop's performance? Or will it if I don't eventually replace the battery?

I am near a socket 90% of the time I use my laptop, so it's not too much hassle keeping it plugged in; I just want to make sure there is no effect on the actual laptop!


asked May 03 '11 at 12:39

its_stephen's gravatar image


edited May 03 '11 at 15:38

Fogarty's gravatar image

Fogarty ♦♦

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Generally batteries "kind of learn" how to charge and how long to charge. That is to say that the more often and the longer the time you keep you battery is plugged in, the longer and more often will hold true over time. Thus, the recommendation is to train you battery in the beginning of the laptop's life and fully charge and then fully discharge the battery. You should discharge your battery completely dead at least once a day. Also, it's not a bad idea once or twice a week to do a hard power down while holding the power button down an additional 10 or 15 seconds to discharge the capacitor which holds a store of energy for quick reboot. When I faced your problem with my battery, it was not long that I just had to buy a new battery. The newer the machine, the better it is to have the habit of full charge and full discharge. Newer machines are more energy efficient but, use more energy at the same time.

answered May 03 '11 at 12:56

Jacque%20Pharmer's gravatar image

Jacque Pharmer

woh thats really nice tips a lot of which i didn't knew about, thanks man!

(Jul 20 '12 at 02:47) bharatkumargupta bharatkumargupta's gravatar image

Depends, do you own a Dell laptop? Some of their laptops have a program built in to recognize if it is using a Dell battery or Dell charger. If one of those things is not Dell, they slow your computer down. They have come under fire for this because the chips inside of the batteries and chargers are easily fried, so even a Dell part can still not register as a Dell part.

answered May 05 '11 at 10:21

Josh_M's gravatar image


Generally, no.

Unless for some rare and weird reason the battery has voltage spikes coming out of it and it damages the laptop itself. Then again it would be a very rare case.

answered May 03 '11 at 12:52

Billy%20Aoki's gravatar image

Billy Aoki

While doing a full charge and discharge every few months helps maintain a good power level, doing it too often will damage the battery. Li-ion batteries take damage when ever they are deep cycled, but it is needed once in a while to recalibrate the charger.

if you bypass the charger of a li-ion battery (try it with a old cellphone battery), a small overcharge is enough to cause the battery to either vent hot fumes or set on fire

(do it outside as the fumes from a exploding li-ion battery is very poisonous and can melt many weaker metals)

answered May 03 '11 at 14:20

Razor512's gravatar image


If u have a speed step processor it could be set to run slower on battery power than when its plugged in. However i dont believe the cpu speed is adjusted by what percentage of power u have left...

answered May 03 '11 at 14:29

stuckeyjim's gravatar image


The bad battery shouldn't have any effect on the performance on your computer. I have a few old laptops that last 5 minutes (if I'm lucky). I use the batteries as a back up power supply more than anything. What could hurt your computer however, is the system force-shutting down. This would occur if you had the computer sleep or shut down at a certain battery percentage, and the battery died before the computer completely shut down. This could possibly harm the files that were open on the hard drive. This hasn't happened to me before, but I know people that have been affected by it.

answered May 04 '11 at 23:57

KylePolansky's gravatar image


Interesting to read about batteries on Dell laptops.

My Dell Vostro 1500 has really been slowing down lately. A year ago the "Battery Needs Replacing" message began to pop up when I booted it, in the last month I now get "Battery life is ended".

I only get 5 minutes at best from the battery, but I was wondering if this is slowing down the laptop in any way.

I always run on mains power, but the plug has been known to pop out of the socket at times, so I am reluctant to run without a battery, except to perform some tests (which I am about to do) to see if it makes any difference to performance.

With the laptop 4 1/2 years old (but still as good as new except for only having 2gb of ram and a slower processor of course) and having the higher rated battery, I am debating whether to buy a new battery or whether to make this last until it dies and then buy a new one. Since this has a high spec display and video card it's going to cost me a lot to replace though, which is why I want to keep it going as long as I can.

answered Jan 29 '12 at 06:34

poddys's gravatar image


This isn't really an answer, but recently there was a power outage in my area and I ran my laptop completely dead and didn't get to chargeit for the next couple of days, and after I got it back up and running, it seemed alot slower, I own a Dell Inspiron, any help? Do I need a new battery or will it go back to normal after a while?

answered Jul 01 '12 at 08:28

Danielh's gravatar image


I suppose if you had a low battery threshold that will turn off some of your performance boosters it could cause it to kick in faster, otherwise no.

answered Jul 01 '12 at 09:14

trueb's gravatar image


After almost 6 months of my Dell Vostro telling me that my battery needed to be replaced, and the system performance being sluggish and the fan coming on often, especially when playing Facebook games, I decided this weekend to remove the battery and to run on mains only. The battery had barely been giving me 10 minutes life.

It seems that the performance is slightly better, the system is running a bit cooler, and the fan is not racing away, so I deduce from this that maybe the system is overheating trying to charge a faulty battery.

I have a new battery on order, so in the next few days I hope to be able to prove a point.

(Jul 01 '12 at 12:52) poddys poddys's gravatar image

in my case i m also facing the same problem, when there is a power cut and my laptop is on a battery i think my laptop switches to on-board graphics and performance is stuttery. I dont know the exact reason for it though!

answered Jul 20 '12 at 02:49

bharatkumargupta's gravatar image


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Asked: May 03 '11 at 12:39

Seen: 37,343 times

Last updated: Jul 20 '12 at 08:56