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The Guardian - UK
The Guardian - UK
Technology
Jack Schofield

Running a laptop on mains power

I have bought a Toshiba laptop for home use, connected to the mains supply. Should I remove the battery?
Claude Hutton

Most laptop batteries are now lithium-ion designs that only work for a limited number of cycles (ie, charging and discharging). They also suffer more from oxidation due to heat and when kept fully charged, so your battery should last longer if you remove it. The Battery University says laptop temperatures can climb to 45C, and "the battery's life expectancy when operating at high temperature is half compared with running at a more moderate 20C (68F) or lower".

However, the BU also says: "Lithium-ion is well suited for laptop users who continually switch from fixed power to battery use. This user pattern is typical for those in the sales, service and medical field."

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