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I have a HP Mini laptop. If I stay near an external electrical power source, is it right to power the laptop from this source if the battery is not empty?

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Similar question:… – sleske Jan 3 '12 at 10:21
up vote 3 down vote accepted

Generally yes, I'd use the power source instead of the battery when available.

But keep in mind...

A battery should not be left charged in a dormant state for a very long time. After it is fully charged you should use it at least once every few weeks at a bare minimum to extend battery life. If you are using an older lithium-ion battery, avoid letting its charge drop to 0. Lithium-ion batteries typically have what is called a discharge/charge cycle of 300-500.

For more information, check out Battery University.

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I believe the rule "use it at least once every few weeks" only applies to lead accumulators; I've never heard it for LiIon accumulators. The page to linke to does not mention it either. The only caveat is that a LiIon must never discharge completely; thus when stored for months, you will need to recharge occasionally to make up for self-discharge. – sleske Jan 3 '12 at 10:52

BatteryCare is an excellent freeware tool that can help you manage your battery health and power savings.

BatteryCare is a software created to optimize the usage and performance of the modern laptop's battery. It monitors the battery's discharge cycles and helps increasing it's autonomy and improving its lifetime.

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This isn't an answer to the question. – Lèse majesté Apr 28 '12 at 4:00

You shuould.Avoid allowing the battery to drop below 5% of capacity because most new versions of the Windows OS will automatically put your laptop computer in a forced “hibernation” mode which may cause the loss of some projects you are working on.Only remove or install a laptop battery when your computer is turned off, this will avoid any current surge that could harm your new battery.

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The whole point of hibernation is to retain everything that was in memory, allowing you to restore when you have access to an alternate power source. You will lose what you are working on if it doesn't hibernate and instead just runs out of power while it's running! – Bob Apr 28 '12 at 10:01

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