Samsung Watch9 and Watch Ultra 2: Charging Details Revealed

Two terse entries in a certification database just pulled back the curtain on Samsung’s near-term smartwatch plans. Small lines of text, big implications for anyone who cares whether a wrist computer top-ups quickly between workouts.

What the 3C listing actually shows

The models SM-L3550 and SM-L7150 have surfaced in China’s 3C registry with support for 10W charging. Industry trackers link SM-L3550 to the Galaxy Watch9 and SM-L7150 to the Galaxy Watch Ultra 2. That’s a pragmatic figure: faster than many older wearables, but not a radical leap.

Charging tops out at 10W according to the 3C listing.

Is 10W a disappointment? It depends on how you measure value. Raw wattage doesn’t tell the whole story. Battery capacity, charging curve, heat management and software limits decide how quickly a watch actually recovers power. A smaller battery can reach a useful charge in minutes even at modest wattage; a larger battery needs more careful optimization.

For context, the Galaxy Watch8 and the original Galaxy Watch Ultra shared the same charging rate, so Samsung is keeping expectations grounded. What many buyers want is not just a faster top-up, but better endurance across a day of GPS, music and health monitoring. If Samsung pairs efficient power management with that 10W ceiling, users could still see meaningful improvements in real-world runtime.

Rumors point to a July 22 reveal in London, when Samsung is expected to announce its next-generation watches alongside new foldable phones. The company has already signaled it will debut multiple wearable models and has rolled some new health features into the Samsung Health app. That suggests Samsung is thinking in systems: hardware, software and services working together rather than chasing headline watts.

One other detail worth flagging: there’s talk of a Galaxy Watch9 Classic joining the lineup. If certifications are any guide, the Classic would likely share the same 10W charging spec as its siblings, making charging parity across the family a safe bet.

At this stage the takeaway is simple. The 3C entries don’t change the story dramatically, but they set a baseline for expectations. Fast charging headlines would have stirred more excitement, yet a measured step toward consistency—paired with improved battery management—could still be the most useful upgrade for everyday users.

Curious to see whether Samsung’s software tweaks will squeeze extra life from the same charging limit? Mark the London date and watch the hands.