So, you just updated to iOS 11 (or iOS 12) and your battery case stopped working. Which version of iOS are you on now? Who knows, I have gone through four updates myself and just got to 12.1.
Apple iOS can be picky about accessories. The Apple customer forums have articles about this issue every time they update iOS. You may have seen the "Accessory Not Supported" error.
(iOS 11 doesn’t always report "This accessory may not be supported" – sometimes the battery case or power-bank turns on and the phone just doesn’t start charging)
While you are regretting the hassle of upgrading iOS constantly, take a minute to read this great article on new iOS features from TechRadar. Or, maybe more importantly depending on which model iPhone you have, Why You Still Shouldn’t Download iOS 11 on an Older iPhone.
Sorry for the hassle, and thanks for being a customer.
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About the Author: Cameron Christian Owner, President-CEO. After 25 Years in the corporate world, I am creating my own destiny. I bought the business so we can continue delighting our customers with real wood products that are beautiful and functional. Follow us on Instagram or email me at Cameron.email@example.com.