Cool, thanks for the feedback everyone!
Nubo wrote:Judging by the excellent longevity of my wife's Macbook Air, I suspect Apple chose a decent compromise between run-time and battery life and must have chosen a conservative voltage cut-off.
Keep in mind that (as with LEAF), the concept of "100% charge" is fluid. There's the 100% as presented to the consumer, and 100% as defined by the battery manufacturer -- both of which are arbitrary values chosen as compromises between run-time, longevity, and safety. So Apple's "100%" may be entirely different than another product's "100%" even if they use the same cells.
Good point. My wife's MacBook Air from 2013 is still going strong with plenty of battery capacity. I just replaced my Surface Pro 3 from 2014 due to a depleted battery (was getting about 2.5 hrs on a good day, it was a 9 hr battery when new). Both computers probably spent a similar amount of time plugged in, so I expect that you are right on this point, that Apple did a better job of preserving battery life than did Microsoft in this case. Of course there will always be other factors...such as my Surface Pro 3 spending a year in southeast asia with me while I attempted to edits photos and videos on it...those high temps and heavy use surely expedited the battery's decline.
I would like to start doing this with my new computer to get the most life out of it that I can. I guess my only option is to create my own charging timer system, similar to the Leaf. Wish Microsoft had something built-in like those lovely Lenovos!