10 - 30 minutes
Stealthy and lightweight laptop with a dead battery is just another surface to write on...that's not high tech!
quick and easy. Boy, lots of dust collects in the cooling ducts though over 3+ years
I found that the 5-point screwdriver worked fine to both remove the case cover and the battery screws
MacBook Air 11" (Mid 2011 to Early 2015) Replacement Battery
P5 Pentalobe Screwdriver Retina MacBook Pro and Air