Background Info: My wife's iPhone 6s+ has been shutting off at 20-40% and it drops like a brick from 100% to 40%. This has been going on for awhile (4+ months) - my wife can live with it so she does. I plug her phone into coconutBattery and it will sometimes show 90% health and other times below 80% health - it isn't consistent. When restarting the phone, the battery % reader will jump all over the place. For example, at 45%, we can shut off the phone, restart, and it will say 8%. You plug it into a charger and it will shoot up to 45% within 5 minutes. So, got an appointment at Apple to have them check it. Of course, took them 30 minutes to see us after we got there ($*!@). The kind Genius did the "remote diagnostic thing" which failed to complete 3 times because "Issues Were Found" - he could never get it to complete but he blamed his iPad and said nothing was wrong with the iPhone. He also said the battery was 80%+ and there was nothing they could do. I'm not upset at all, no worries (bigger things to worry about in life than this), he proceeds to spend 10 minutes kindly showing us how we should turn off GPS settings for Google products, etc... I thank him again (he was nice), and we head out. Solution: I'm just going to pay to get a new battery. I think it's $80? So my questions are: How long does it take them to replace the battery? The nearest Apple store is over an hour away from where I live. How long should I set aside for the battery replacement? I assume I should schedule a genius appointment again just like I did now? Thanks for taking the time to read and help with questions (similar stories very welcome!).