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Should laptops remain plugged in when their battery is 100% charged?

Fresh3 days ago
Mar 15, 2026204852 views
Confidence Score1%
1%

Problem

When your laptop's battery is 100% charged, should you leave it plugged in so any battery power doesn't get used, or will that cause overcharging, overheating, etc.? Should the laptop be unplugged when the battery level is 100%? I'm asking because my laptop's screen tends to get dim when unplugged, so I don't like to run it on battery.

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Fix for: Should laptops remain plugged in when their battery is 100% charged?

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This page has a good answer: "it depends" The answer is: YES and NO, it depends on the situation. Having a battery fully charged and the laptop plugged in is not harmful, because as soon as the charge level reaches 100% the battery stops receiving charging energy and this energy is bypassed directly to the power supply system of the laptop. However there's a disadvantage in keeping the battery in its socket when the laptop is plugged in, but only if it's currently suffering from excessive heati…

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