I went from under 1 hour battery life, using the original (old) stock battery, to 4+ hours with this one. Fits properly, charges fast (under 1 hour for me), and doesn't get hot. Pretty much exactly as expected. The only micro-complaint I would make is that the black finish isn't a perfect match for the original (and thus not for my actual laptop), but it's only something a critic would notice, while looking for something to be critical about.
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