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This machine boasts a 77.5 Watt-hour battery. That's the same capacity as the previous revision, but the reported battery life has gone from 8-9 hours to 7 hours. Has performance really decreased, or is Apple being more realistic with their estimates? We don't have 7 hours to wait and find out, so we'll have to leave that investigation to someone with a fully-assembled unit.

Just like the previous revision, the battery is secured by Tri-Wing screws.

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