Well, leak season is officially here. It happens every August like clockwork: the rumor mill starts churning ahead of Apple's fall event, and this year the Apple Watch Ultra 4 is the one in the spotlight. According to a roundup of leaks over at Geeky Gadgets, we're looking at a September release with some genuinely interesting changes under the hood.

Let me back up for a second, because I remember when a smartwatch doing heart rate monitoring felt like science fiction. Now we argue about battery life measured in days instead of hours. My how far we've come from the first Apple Watch, which I charged every single night like a needy houseplant.

So what are the leaks saying? The headline items are a design refresh and, the one that matters most to me, battery life. The Ultra line has always been Apple's endurance play, built for the hikers and marathon runners of the world. And in my experience, battery life decides whether a watch works for you or becomes another gadget you babysit. If Apple has found a way to squeeze more runtime out of this thing, that's the upgrade I'd tell my family to care about.

On the design side, the most concrete detail in the leaks is a thinner case, somewhere in the range of 10 to 15 percent slimmer. That's not a reinvention, and frankly it doesn't need to be. Apple treats the Ultra's boxy titanium case like a signature at this point, and they know it. A thinner version of a familiar shape is evolution rather than revolution, which suits me fine.

Now, my standard disclaimer, which my granddaughter Jess could recite from memory at this point: these are rumors, not facts. Supply chain leaks have gotten remarkably accurate over the years, but September is still a few weeks away, and Apple has surprised us before. Don't go listing your current watch on the resale market just yet.

If history holds, we'll likely see this announced at Apple's usual fall event. And if you're eyeing a new Ultra, my advice is the same as it was for the Galaxy preorders last month: wait for the official announcement before spending a dime. The leaks tell you what might be coming, but the launch tells you what it costs and when you can actually put it on your wrist.

I'll be watching the fall event closely and will report back once we have real specs instead of educated guessing. In the meantime, keep your current watch charged and your expectations calibrated somewhere between hopeful and skeptical. That's the sweet spot for August in the Apple rumor cycle.