Samsung Galaxy Watch Ultra 2 Battery Leak Points to 800mAh

Samsung seems to be putting battery life front and center for its next rugged smartwatch. Recent reports point to a larger cell for the Galaxy Watch Ultra 2, with charging speeds staying the same. The result could be a clearer endurance advantage over the current model and over Samsung’s standard Galaxy Watch9 lineup.

Galaxy Watch Ultra 2 Gains a Big Battery Without Faster Charging

Samsung appears to be leaning on endurance instead of faster charging for its next rugged watch. The Galaxy Watch Ultra 2 is said to jump to a rated 784mAh cell, likely marketed around 800mAh, while charging stays at 10W like the current model. That puts battery life at the center of Samsung’s premium smartwatch pitch ahead of the expected July launch window.

The reported change matters because the current Galaxy Watch Ultra uses a 590mAh battery. In practical terms, that is a meaningful step up rather than a small revision. Samsung is not changing the charging speed, so the message from this leak is fairly clear: the company may be focusing on longer runtime instead of faster top-ups.

That approach makes sense for a rugged smartwatch. Users who buy this kind of device usually want something that can handle heavier GPS use, workouts, and time outdoors without needing a charger every day. Based on the leak, Samsung seems to be targeting exactly that use case.

There is still uncertainty here, of course. The battery figure is reported as 784mAh, not a confirmed retail spec, and the 800mAh number is likely the rounded marketing version. Even so, the direction of the change is hard to miss. If the leak is accurate, the Galaxy Watch Ultra 2 would be one of Samsung’s strongest endurance-focused wearables yet.

That also gives Samsung a simple way to frame the watch against other premium Android smartwatches. Instead of stressing charging speed, which does not appear to be changing, the company can point to longer battery life as the main upgrade.

Galaxy Watch9 Battery Leak Suggests a Smaller Upgrade

The standard Galaxy Watch9 looks set for a more modest battery bump on the 40mm model, with a reported 382mAh rated capacity and a typical 400mAh figure. That smaller gain, alongside the unchanged 44mm battery claim, suggests Samsung is reserving the biggest endurance push for the Ultra model as it lines up against Apple Watch Ultra-class rivals.

That split is important. It suggests Samsung is not spreading the battery upgrade evenly across the lineup. Instead, the Ultra model seems to be the one getting the clear attention, while the regular Galaxy Watch9 appears to be receiving a smaller update that may be easier to miss in day-to-day use.

For buyers, that likely creates a familiar tradeoff. The standard model may still be the more compact option, but the Ultra version appears positioned as the better choice for people who care most about battery longevity. According to the leak, Samsung is using battery capacity as one of the main ways to separate the two watches.

It is also worth noting that the 44mm Galaxy Watch9 is not being described with the same kind of uplift. That leaves the Ultra as the standout in the lineup, at least based on the current reporting. For Samsung, that may be enough to keep the premium model feeling clearly premium without changing too much else.

If these numbers hold, the battery story for Samsung’s next smartwatch generation is pretty straightforward. The Galaxy Watch Ultra 2 is getting the bigger endurance boost, while the Galaxy Watch9 looks to be improving more modestly. That makes the Ultra the watch to watch for users who want the longest possible runtime from Samsung’s next release.