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[* black] The battery's form factor seems 100% identical to the multi-lobed cell we found in the 2015 Macbook.
[* black] And yet somehow... a battery spec bump!
[* black] Apple managed to squeeze in a 4% capacity increase from the 7.55 V, 39.71 Wh battery in [guide|39841|last year's model|stepid=89847|new_window=true]. Apple claims this new 7.56 V, 41.41 Wh Li-ion power source should provide up to 11 hours of iTunes movie playback.
[* icon_note] We're guessing this capacity increase is owed to improved battery chemistry, butchemistry (though it's also possible that Apple's engineers have shaved away ''just'' enough material from the lower case to allow for a thicker battery.battery).
[* black] Either way, our tests indicate this beefier battery is compatible with last year's MacBook. Nice!
[* icon_note] We're guessing this capacity increase is owed to improved battery chemistry, butchemistry (though it's also possible that Apple's engineers have shaved away ''just'' enough material from the lower case to allow for a thicker battery.battery).
[* black] Either way, our tests indicate this beefier battery is compatible with last year's MacBook. Nice!