Laptop Battery, Extending Life


Active Member
I have aToshiba Satellite laptop. It's used mainly plugged in. For those times I'd like to use it unplugged, I want to extend the battery's life as much as possible since this model laptop has a battery that is very hard to replace by the average user. Is it good policy to run it only on battery on occasion, or doesn't that matter anymore? I notice that when plugged in, the battery charges only to 80%. I suppose that's a protective feature. Thanks for your insight.


Windows Forum Team
Staff member
Laptop batteries will stop charging when they hit 100% after which the battery will be bypassed. Leaving a laptop plugged won't cause any problems to the battery. The fact that yours isn't charging beyond 80% would indicate a problem with the battery, possibly a bad cell.

Axel PC

Well-Known Member
I've owned a Lenovo and Samsung (Windows 7) and they both came with custom battery management software. And they both had settings that allowed for longer battery life. And this setting didn't allow the battery to reach 100% charge while plugged in. I believe they stopped around 80% too?

My current Asus laptop (Windows 10) also came with similar battery management software. However, Windows 10 has battery saver settings built in.

But yeah after some time but years and usage factored in (discharging + discharging) your batter will not hold a full charge and/or for as long as it used to. But honestly even my older laptops, I didn't noticed the downturn in battery performance till 3 years after purchasing.

Hope this helps?



Senior Member
hermitkrab … similar to you, i also use my laptop (toshiba satellite) via ac-plug. the unit arrived to me as oem win-8 and never rose above 74% … now that i have win-10 integrated … she seems comfortable at 80%.

furthermore … i stipulate there is nothing wrong with any of the battery's cells … it's simply configured for econo-mode … to preserve life of the battery. purportedly, this econo-mode behavior can be changed via toshiba's battery-lifecycle option. however … i decided not to alter my default settings.

feel free to review the attached screen-cap.


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Active Member
Thanks for the replies, friends. I'm glad to learn my PC is operating correctly.

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