laptop charging all time

I have a problem with my laptop battery. I have it set to charge up to 80% only, as recommended by its manufacturers, Samsung. However, if I run it on battery only, it goes down to about 69% full in 20 minutes, and then suddenly says it only has 8% charge left and must be recharged at once. Does anyone have a solution to this problem? What it means at the moment is that the batter is pretty much useless, but I don't think it is a battery life problem as the laptop is only about 6 months old.

One thing that experts recommend against is the partial charging of batteries. So either you go completely on direct power or if you start using the batteries, let it discharge all the way down to the bare minimum. Then you can charge it up again. That will keep the batteries with a decent life. Cheers! Ram

I have a netbook and it's almost always on the charger unless I'm using it elsewhere. My battery is old as is this netbook so until I get a better battery I do have to rely on it spending most of it's time on the charger.

I keep my laptop plugged in because power situation in our area does not allow us to go by the rule that says 'have your laptop batteries fully charged then unplug it unless your battery is about to discharge fully and gives warning signal' Keeping it plugged in makes big difference to particular cells, which neither get charged nor get discharged. Therefore, that is the right way, but we cannot afford to do that because you never know when the power would go. I know in other countries where there is no power failure for a moment they take batteries out and run their laptops on mains. They only use their batteries while they go out. That is not possible here so let some of the battery losses take place due to over charging.

Yes.when use laptop,than charge it. so battery of laptop will be good.

What your talking about is called the memory effect. And it depends on the type of battery your laptop has as to whether your battery will suffer from it or not. The newer batteries, lithium ion batteries (also known as li-ion batteries) do not suffer from this effect. You can see if your battery is a li-on by opening your laptop battery case and looking at the battery (it will say li-on or lithium ion if it is) or checking your owner's manual.

The best thing for your battery, is to keep it plugged in. The worst thing, is to partly deplete your battery, then charge it, over and over. Of course, batteries today are made so well that they can withstand doing these actions many many times. I've had my laptop for about 3-4 years now, and at first, the battery would last for about 4-5 hours. I keep it plugged in most of the time, and every so often unplug it and take it out (recently, I've been doing that a lot more...). Now, the battery will last for around 4 hours. 4 years, vast majority plugged in, difference, less then 1 hour. Not bad. By that, it'll take around 8-12 years for the battery to be failing... and I think by then, I'll have another laptop.