(This video is not sponsored by the seller).Battery Replacement Required was the message which used to show up in the battery icon. The macbook used to be on Started to get really slow. Turned it off. SMC reset. Fan now on full blast and slow as hell. Boot into apple diagnostics. Complete test. Result is something about SMC issue. Cannot detect battery (but it was actually able to run on battery alone and not a/c). My M1 Air has had 36 cycles and is reporting a maximum capacity of 91%. Almost 10% down in ~3 months is terrible. I guess I'll be contacting Apple about this. 25 cycles and 95% for me. Coconut battery says 88%. Seems horrible. My cycle count is 2140 with a capacity of 4125 mAh. Planning to use it till the count hits 4k at least. 13 inch MacBook Pro 2015, cycles 1090, capacity 82%. Original battery was replaced on warranty after 1 year, condition normal. Read our MacBook Air (11 inch, early 2015) review and MacBook Air (13 inch, Inside the 13in MacBook Air is a 54 Wh lithium-polymer battery, that’s the same energy capacity as last year’s I have Early 2015 MBA as well. I bought it used about a year and a half ago, and it has 405 cycles on it, and coconut battery shows 88.1% of original capacity. I have a new battery actually showing up tomorrow that I ordered off iFixit, just because I wanted a brand new battery to see how it performs. Don't think they ship out of USA. This Q&A covers the original, Late 2008, and Mid-2009 MacBook Air models ( A1237, A1304 ). EveryMac.com provides storage upgrade instructions for later MacBook Air models -- the "Late 2010 and "Mid-2011," "Mid-2012," and "Mid-2013," "Early 2014," "Early 2015" and "Mid-2017" lines, too. Officially, the hard drive or SSD in the original, "Late Your battery is designed to retain up to 80% of its original charge capacity at its maximum cycle MacBook Air (13-inch, Early 2015) MacBook Air (13-inch, Early Here's how you can check the battery cycle count on your MacBook. Click the Apple ( ) symbol in the top-left corner of your Mac's menu bar. Click About This Mac. With the "Overview" tab selected Click on Service Recommended from the menu that opens when you click the battery icon in the top menu bar. Go to System Preferences > Battery. You will see in Battery that you have an “Important Battery Message” telling you that your battery’s capacity is significantly reduced. You can also click on Battery Health to see what it tells you cWWXDL.