This swollen, bloated MacBook Pro battery comes to us courtesy of Engadget reader Brade, whose ridiculously broken cell continued expanding even days after it was pulled from his system. Silver-lining: Apple was cool about replacing the thing. So let it be known: battery safety comes before productivity, so make sure your unit isn't one of the recalled batteries, and for God's sake, if you're seeing the swell, take it out and quarantine that thing immediately. (See also part 3, part 2, the original, and the recall.)

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Bloated 17-inch MacBook Pro battery, part 4

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