My early-2014 Macbook Air battery had finally gotten to old, so I purchased a replacement last week, a 5-star rated third party Temark battery. Turns out it really sucked. I am going to return it. So, I went and purchased a Macsales (Newertech) battery, because they have a good reputation and I have always had great luck with Macsales memory over the years. Well, it's sucks just as bad. I just tested this last battery, after booting in Safe Mode, disabling browser extensions, I ran a youtube video in a tab. Only. Brightness was down to about 60%. In 90 minutes, it ran down the battery from 79% to 17%--a 62% loss of battery capacity! So now I think I'll return this one as well, and then go to Apple and get them to install one of their own. I don't think I can order one anywhere online, and have to go to the Apple store (where they will likely have to order the battery). Anyway, with that backdrop, can someone tell me just how much battery life I should expect from a real Apple battery? 7-8 hours right? I'm really shocked at how bad these off-brand batteries are. P.S. It took 10% of my battery just to write this post.