Bigger Battery
A recent rumor suggests that at least one model of the Apple Watch may ship with a larger capacity 303.8 mAh battery and possibly longer battery life. Previous rumors, though hint at capacities of 265.9mAh and 262.9mAh, which are lower than the Apple Watch 5. Regardless of the size, Apple may squeeze more power out of the battery due to a Micro LED display or power management improvements in the S6 chip.