Prevent battery from charging when plugged in?

On my Samsung laptop I am unable to remove the battery (I think its unibody design) which is what I normally do because I keep it plugged in to the mains.

Does anyone know how to tell the laptop to not charge the battery when it is plugged in?

 

When your battery is at 100%, the power will bypass the battery and only be used to power the laptop. Although there are opinions on both sides, it is completely fine to keep your laptop plugged in.

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So will it stay at 100% all the time even if the battery is being bypassed?

I was actually hoping to run the battery to 0% and never charge it up again because I just don't use the battery. However will this be bad for the battery?

 

Lithium ion batteries are optimally stored at 40% capacity. There are official reports if you google

Batteries die faster when you drain them down to 0.

While its plugged, the battery while hover around 100%. As its losing its charge, the battery will get a bit of juice from the ac to get back to 100. Your power management will display 100% however, but the actual percentage might be anywhere from 95-100, or even as low as 90, depending on where in the cycle the battery is.

Just don't worry about it and enjoy your laptop! In two-three years, regardless of how you've treated the battery it will hold less than an hour's charge anyways

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You meant keeping the battery charged 100% all the time? Many would say "yes" and many would say "no". I belong to the latter

cheers ...

 

i guess you have an old model laptop because in the latest laptop models there is a technology or you can say a method introduced in which you just have to click on the battery charging icon in the taskbar and in the properties you simply find out the option to start charging or stop charging the battery, rather unplugging or plugging with the main power supply. And even in few laptops when the battery is fully charged the laptops run on the main supply bypassing the battery supply. But sooner or later when you keep on using the battery after a year or two the charges worn out and your battery doesn't charge fully and keeps on charging, i.e its discharge time reduces and that eventually means it is the time to replace the battery. So, it is better to learn which battery is placed in you laptop and how long exactly it takes to charge it up fully. Do it manually and punctually rather putting you battery on charge for hours and hours.

 

When I normally buy a new laptop, I leave the battery pack in the box and never use it. So I just wondered how to achieve the same thing for a laptop that has a battery built-in which I can't remove. I just didn't want the laptop to keep charging the battery and wear it out when I didn't even want to use it. The reason I am asking about this is because I usually sell my laptops after a year and I don't want to sell someone the laptop if the battery is not in good condition. Usually I just say the battery has never been used but I can't if its built-in.

 

A) why do you buy laptops then... and b) the battery stops charging when full. The battery will be fine in a year, but really what you should do is unplug it and let it run down and then charge it back up every so often.

 

If you don't use the battery, why do you care? I don't understand what problem you are trying to solve. Just let the computer do it's job. As other have said, when it reaches 100%, it will not be charged anymore.

 

And there is no option in the manufacturers power manager?

My age old Sony from 08 allows the charge to be set at a certain percentage, even the Lenovo's we use at work too.

 

Even the OEMs are (collectively) undecided as to whether or not having the battery fully charged all the time shortens battery life. Which is why some brands have this feature and some don't.

All I can say is, nobody really knows. There's been very few scientific studies on the issue of how to maximize the lifespan of a lithium ion battery.

 

My over 5 year old Thinkpad T61 laptop (company) still has the original battery and lasts about 70% as long as new. I have it configured to charge when below 80% and to stop charging at 95%. Over charging is bad so I prefer to stop below the full charge point to prevent one of the cells from over charging. When plugged in. which it is 90% of the time, it is seldom running off the battery or charging it.

I'll be picking up a new Samsung Series 7 laptop tonight and hope I can similarly configure the charge process on it. I'll sacrifice 15 minutes of maximum charge in order to limit over charging...


Brian

 

General consensus is just don't concern yourself with it. From my understanding, batteries are microprocessor controlled and should prevent over-charging. If you want, you could just manually remove the battery and store it if it's that much of an issue.

 

I think I sorted it. There is a setting by the manufacturer that stops charging at 80% and bypasses the battery. Hopefully this will be ok.

I've seen people ruin batteries by not letting them discharge fully and recharging them whenever they want. I wanted to avoid having the battery charged everytime it was plugged in.

 

I don't see how holding the charge at 80% is any better than holding the charge at 100%, but OK.