As probably one of the heaviest portable users of the Retina Macbook I thought I'd share with you my battery stats after 602 cycles. I use the machine all day, plug in when I'm not using it, run it almost all the way down often, and give absolutely zero thought to battery management or what the latest and greatest "do this to conserve your battery life" advice is. Purchased this the first week they came out. It's a 1.2Ghz 8Mb 512Gb configuration. 602 Cycles Maximum Charge: 4355 mAh Design Capacity: 5297 mAh 82.2% Battery Capacity The highest it has ever been is 95% (first week of ownership) and the lowest it has ever been is 77% (on 5/23/2016 @ 503 cycles). Mostly WiFi web browsing, Excel, Word and Mail apps. Very little game playing. Moderate video watching - mostly YouTube. All statistics via Coconut Battery.