A recent Samsung Galaxy Watch 9 leak revealed details about the battery size of the 44 mm version of the incoming flagship wearable. The battery appeared in public certification documents under part number EB-BL355BAY and has a rated capacity of 435 mAh. Because the typical number is always higher, a 435mAh rated capacity suggests the watch will likely feature a typical capacity of around 445 to 450mAh. This represents about a 2% growth in battery capacity for the 44mm version compared to the previous model.
Rumors suggest that three distinct models are in the works this year. Buyers can expect the standard Watch 9, a Watch 9 Classic, and a premium Watch Ultra 2. The latter may even support 5G connectivity. The battery certification marks the most direct reference Samsung has made to new devices so far.
What to Expect From Battery Life and Charging
In terms of power management, a major leak indicates that the Samsung Galaxy Watch 9 will keep the 10W charging speed of its predecessor. You can expect the smartwatch to charge from 0% to 100% in about 1 hour and 10 to 20 minutes. The overall battery life should comfortably reach around 30 hours with the Always-on display enabled.
The hardware driving that battery will likely include the Exynos W1000 3 nm chip, but some rumors suggest it could use the Snapdragon Wear Elite chip instead. Other specs include standard LTE and Bluetooth connectivity along with built-in storage. The smartwatch is expected to run One UI Watch 9, based on Wear OS 7, to manage these features.
Display Details and Build Materials
Leaks have not yet revealed the exact display size and other specifications, but Samsung will likely stick to the same 1.47-inch and 1.34-inch display sizes as its predecessors. The small 40 mm model should have a resolution of 438 x 438 pixels, while the larger 44 mm model should have 480 x 480 pixels. Fans will see no update in the squircle design, and the watch will use aluminum materials for both the 40 mm and 44 mm sizes.
For reference, the Galaxy Watch 8 had a screen brightness of 3,000 nits, which is the current standard for top-tier smartwatches. We expect similar brightness this year as well. The latest Samsung Galaxy Watch 9 leak suggests the screen will be just as vibrant outdoors as the previous generation.
New Galaxy AI Tools and Upgraded Health Sensors
Health tracking will receive a significant upgrade with the new Galaxy AI integration. The wearable will likely feature Samsung’s 3-in-1 BioActive sensor to monitor heart rhythm, heart rate, and body composition. This AI-driven health tracking will provide users with clearer insights into their daily fitness routines.
The device will also retain full hardware for ECG, continuous blood pressure monitoring, sleep apnea detection, and the metabolic AGEs Antioxidant Index. Recent Samsung Galaxy Watch 9 leaks indicate these sensors will work together to give a more complete view of your health.
Samsung Galaxy Watch 9 Price and Launch Timeline
A final Samsung Galaxy Watch 9 leak detailing the retail price has not surfaced just yet, but a price increase is possible. Its predecessor started at $349, approximately ₹ 33,190. The new wearable is expected to launch alongside the Galaxy Z Fold 8 and Galaxy Z Flip 8 at the Samsung Unpacked event on July 22, 2026.
Overall, the Samsung Galaxy Watch 9 aims to improve battery life by combining larger batteries with an efficient processor. It also enhances on-device AI health tracking. This represents a significant upgrade for users of older models. However, current Galaxy Watch 8 users may not see enough improvement to justify upgrading.
