It’s shocking to think that it’s been more than a decade since the first Android smartwatch launched, and yet, we still don’t have a universal charging system. Even within a single company’s smartwatch lineup, we often see new charging systems introduced every few years, and often the new system isn’t backward-compatible. This can be highly frustrating, as it effectively renders your older chargers and accessories redundant when it’s time to upgrade.Google, unfortunately, is not exactly helping this cause when you look at its own Pixel Watch series. In a span of just four generations, we’ve had three different charging systems for the Pixel Watch (four, if you count the new Fitbit Air).