MacBook Owners. Your battery is designed to retain up to 80 per cent of its original capacity at 1,000 complete charge cycles. The one-year warranty includes replacement coverage for a defective battery. Apple offers a battery replacement service for all MacBook, MacBook Air and MacBook Pro notebooks with built-in batteries.
I did the following test with my i3 MacBook Air: Laptop OFF while charging Using the stock 30W charger Initial state, battery 0% After 60 minutes of charging, battery level is 53% at 105 min, battery level 89% at 120 min, battery level 97% at 135 min, 100% Using a 65W charger Laptop OFF while charging Initial state battery at 0% After 60
How long your 100% charge on your MacBook will last really depends on your usage patterns as well as the Mac model you are using. Screen brightness will also be one of the most important factors that will affect the duration of one charge — at max brightness you will see much less autonomy of your devices.
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