Samsung’s next premium smartwatch may be setting up a simple pitch: keep the Galaxy Watch Ultra look, then give the Galaxy Watch Ultra 2 enough battery to survive a harder day. A new leak says the watch is moving to a rated 784mAh battery, which Samsung would likely advertise as around 800mAh. That is about 35% more than the original Ultra’s 590mAh cell, and for a watch that spends its life tracking GPS runs, workouts, and always-on notifications, that kind of jump is the difference between ”fine” and ”finally.”
The battery is only half the story. The Galaxy Watch Ultra 2 is also tipped to use Qualcomm’s Snapdragon Wear Elite chip, replacing Samsung’s Exynos W1000 on the inside. Both are said to be built on 3nm, but the Snapdragon part is expected to stretch power further thanks to a more efficient design and a dedicated low-power NPU. In smartwatch terms, that matters more than raw speed; nobody buys a wrist computer to watch benchmark charts burn battery.
Galaxy Watch 9 battery sizes leak too
The regular Galaxy Watch 9 lineup appears to be getting a quieter but still welcome upgrade. The 40mm model is said to carry a 382mAh battery, or around 400mAh when marketed, which would be roughly 23% up on the Watch 8. The 44mm version is tipped at 435mAh. Both are expected to keep 10W wireless charging, so Samsung is not changing the refill story, just giving you more time before you need the puck.
- Galaxy Watch Ultra 2: 784mAh rated battery, likely sold as around 800mAh
- Original Galaxy Watch Ultra: 590mAh battery
- Galaxy Watch 9 40mm: 382mAh battery, marketed around 400mAh
- Galaxy Watch 9 44mm: 435mAh battery
- Charging: 10W wireless charging for both Watch 9 sizes
Samsung is chasing better battery life
The direction is obvious: more breathing room for heavy GPS use, always-on displays, and workouts that last longer than your motivation. That also puts Samsung in the same conversation as the rest of the premium smartwatch crowd, where endurance has become the last big excuse left for buyers to tolerate another charger in the bag. If the leaks are right, Samsung is finally attacking the part of the spec sheet that people feel on day three, not just the one that looks nice on launch day.
Nothing is official yet, and the timing points to a launch later in 2026. The real question is whether Samsung pairs the larger batteries with software tuning that actually converts that extra capacity into visible gains, or whether the usual ”up to” claims shrink once real-world brightness, health tracking, and workout modes get involved. If the hardware rumors stick, the Galaxy Watch Ultra 2 could be the company’s most sensible upgrade in years.