I was also convinced that iOS 11 caused my battery life to plummet. But it turned out my battery was just broken. You‘d think that batteries should last longer

I was also convinced that iOS 11 caused my battery life to plummet. But it turned out my battery was just broken. You‘d think that batteries should last longer than a year, but it‘s a question of statistics: Some batteries last longer, some deteriorate quickly. I was unlucky with my battery. Tips: 1. Check your battery health. Coconut Battery lets you check your battery health. If it is under 80%, consider swapping it. 2. 3rd party repair shops are faster and a lot cheaper than Apple.