Samsung's extra battery capacity on the Watch9 probably goes to health features

Wired's reviewer averaged closer to 25 hours on the 40-mm Watch9 with Always-On Display enabled, against Samsung's estimate of up to 30 hours, about 17 percent under the published figure ^[13][3]. The charge that follows runs around 100 minutes, so a full cycle takes roughly 1.7 hours off the wrist, and the Pixel Watch 5 does the same job in 45 minutes ^[14][5][4].

Capacity did go up. The 40-mm cell went from 325 mAh to 390, a gain of 65 mAh or 20 percent, and the 44-mm from 435 to 445, about 2.3 percent ^[11][1][2]. Wired puts the flat runtime down to the expanded health features drawing on that extra capacity ^[12]. The review found the watch smooth in menus and app launches on the new platform ^[8].

Wear OS 7 adds more customizable widgets and live updates from compatible apps ^[9]. The one new thing a wearer's hand touches is raise-to-talk for Gemini: lift your wrist toward your mouth and start speaking to Google's assistant ^[16]. "The Google Pixel Watch has had this feature for two generations now, so I'm happy to see Samsung finally catch up," the reviewer wrote ^[10].

On upgrading, the review is blunt. "I wouldn't necessarily upgrade to the Watch9 from the Watch8," Wired's reviewer wrote after two weeks with the 40-mm model ^[5][4]. For someone with an older Galaxy Watch, or a buyer already inside Samsung's ecosystem, the same review calls the Watch9 "the best choice" ^[6].

So this is for the person whose Galaxy Watch is three or four years old, and for the Android shop that standardized on Samsung a while back. A wearables program wants current hardware and one comparable data set across the fleet. The review measured a faster chip, 20 percent more capacity in the 40-mm case, and a longer list of wellness metrics ^[3][1]. The review is headlined "I Don't Need Another Health Score" ^[15]. That is one reviewer's judgement over two weeks on one size, and the review does not report how often anyone opens the new metrics ^[4].

Did any reading from the past quarter change what somebody did, a shift assignment or a training plan? If the answer is resting heart rate and sleep, the Watch8 already produces it. Where does the 100 minutes go, on whose time, and who reminds the wearer to plug in ^[14]? Owners of a three-year-old Galaxy Watch clear both questions easily. A Watch8 fleet clears neither, and buys a new watch to get a processor swap.