I’ve been using this case for about 3 years (I guess), and usually I removed the phone to charge the case separately, and never had a problem with it. A couple of days ago I plugged it in and the LED didn’t light up, and it didn’t charge. But I can still use it! I just have to charge it while my iPhone is plugged in, then it will show up correctly on my iPhone’s screen, and it will also show that it’s charging. And once charged, it still has the same capacity. But it definitely doesn’t charge when plugged in on its own.
I’m pretty sure that there’s nothing I can do about that, but isn’t that a little weird?