Overcharging of notebook battery

Hello there, would appreciate if someone can advice on my question.

I have an Acer TravelMate 3230. According to the salesman, while I'm using the notebook, I can keep it continuously plugged into the mains electricity even after the battery has completed charging. He said there is an automatic charging cut-off and the battery would not have its lifespan reduced. Is that true?

My previous IBM notebook doesn't behave this way. The battery's lifespan reduces if it is ovecharged.

Thanks.

 

Most if not all laptops on the market now will not overcharge the battery.
If the battery is between 95-100% charged, the computer will not charge it.

 

what do you mean by overcharged?

all battery lifespans are reduced with time

i believe most laptops use "trickle charge" which means that if you keep it plugged in while it's at 100% charge, then it will still discharge/charge slowly

perhaps what the salesman means is that your acer doesn't trickle charge and just.. cuts it off at 100% and relies completely on the AC supply then..

 

Now that you mention it, I notice that no matter how much I charge it, when it is solely running on batteries, the battery figure shows 95%. Perhaps as you've said, the computer stops charging at 95%.

 

For my laptop, the battery dies 5-6 months in average. The other best way to save your battery quality and life is while using in battery mode, always make the brightness of LCD low as much as possible so that the battery is not forced.

 

do u use your batt until a few % than charge? tat is the cause of damaging the batt. it is becos the threshold voltage inside tat will make the board inside to cut off the cells.

do change the settings in power options to between 15% to 20% to alarm for low/critical.

 

I hardly use on battery. Even though it dies,but I got warranty so no worry.
As dell told me that if we put the brightness level low on battery,then it will last longer. Just a tip.

 

It's not possible to overcharge or over discharge the laptop battery. The only thing affect the battery's charge capacity is age, heat, and the usual wear and tear.
With majority of current laptop that you can buy, there's no reason to take the battery out. They have acceptable cooling and have proper battery circuitry so there's nothing to worry about.

BTW - to spradhan01
If we put anything on low, whether if its wifi transmission power, cpu clock speed, screen brightness, the battery will last longer. It's not really a tip as is a common sense.

Also, batteries should not die within 5-6 month unless you have a poorly made battery or you charge and discharge your battery 24/7.

 

I use dell's original battery and about the screen brightness, I am not talking about "the battery will last longer",but for the long term health as not for daily use. You will notice that your battery is dying slowly if its on its full power.

 

Virtually all modern Li-Ion batteries, particularly those expensive ones in laptops and such, are "smart" batteries. They have charging circuits which constantly monitor the voltage, current, and heat being held by the battery and generated by the charger. When the battery reaches its preset threshold, it shuts off the charger. Then every so often, the charger will turn on to "top-off" the battery with a very small charge and turn off again. I said "trickle charge" earlier but with Li-Ion's it's not technically a low-current trickle like with Ni-Cads. It's just a top-off charge that happens every 10-20 days or so probably. Therefore there is virtually no chance that a Li-Ion can be overcharged, unless the protective circuit in the battery or charger fails.

so that the battery overcharging is not possible.

 

please refer to Battery Guide as well

 

Thanks all, it's useful information you have provided.

 

Thanks for the link!

 

thank you for this information!