Chosen Solution
Can I install the same higher capacity battery from the mid-2013 (13") MacBook Air, in a mid-2011 (13") MacBook Air?
That’s not going to signifcantly change anything it’s the more efficient processor and architecture – which result in significantly improved battery life – not the battery alone. This happened the last time “significant battery life increase” was announced… hypertheading and other improvements contributed significantly to battery life. If this Answer is helpful please remember to return and mark it Accepted.
