How to Conserve Battery Life on a MacBook

MacBooks have some of the best battery life of all laptops: the 13“ MacBook Air is meant to last up to 12 hours but often lasts longer, while even the 15” MacBook Pro should stay running for at least nine hours as long as you aren’t doing anything too strenuous.

Currently only holds max at four hours. So it means it’s already degrade ?

Source: How to Conserve Battery Life on a MacBook

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