My biggest problem with the latest MacBooks is Apples insistence on selling them without user serviceable batteries. To me that means that the battery life is what it is and you can’t do anything about it. I own an older MacBook Pro with the replaceable battery. And I have a pair of batteries for the machine. What a pain in the neck it is to have two batteries. The webs advice on battery storage is to keep Li-Ion batteries in a cool place at about 40% charge. Also, under no circumstances let your battery discharge to nothing. I have two batteries because I don’t want to be stuck on a trans-continental flight with no laptop but more and more airplanes have empower and a trans-continental length flight is only 5 hours of laptop time when you add it up. The new Apples advertise a 7 hour battery life. Mine does slightly better than 5 on each battery depending on the workload. So in the past few trips I’ve never gone on to the second battery. Given all these things the Empower to Magsafe charger is probably a better investment than a second battery.
Yet another open source journal