Mine’s been consistently good throughout all the time I’ve owned the AWU (first generation). Bought t pretty much at launch, and really really like battery life. No battery drain through any of the OS versions. Now, iOS 17, was a serious and dangerous DISASTER that affected not only BOTH my iPhones (14 Pro at the time as well as the very first iPhone SE (yes, very first generation)), AS well as all my Apple devices, believe it or not. Somehow if fukced up with my entire AppleID ecosystem. I couldn’t call anyone, ANSWER any calls, in ANY of my devices AT ALL, and yes, that included the AWU, the iPhone SE, my iMac Pro, and my MacBook Pro M1-Pro. Calls would come in, I couldn’t answer them, and at one point the iPhone 14 Pro called 911 and both my emergency contacts. I ended up having one friend hurry over from the gym, thinking I was dying or something, and the other was already driving over. Luckily the first friend got here on time to call the other and explain all was well. The police, somehow, was able to get through. They couldn’t barely hear me, but after me repeating many times over that the iPhone was acting up the cops never showed up at my place. Those were very scary and difficult 2 or three days, until the next update, that automagically fixed everything. But that was it. Never any battery issues.