The Short Version
Samsung's Galaxy Watch 9 and Galaxy Watch Ultra 2, leaked via certifications and supply-chain reports, will feature larger 382–784 mAh batteries and Snapdragon Elite chips for better efficiency.
Samsung is directly targeting Apple Watch's most loyal users, people who charge every night without thinking twice. A 784 mAh battery in the Ultra 2 is a serious number. Apple's Ultra 2 watch battery sits around 542 mAh by comparison. Samsung is not catching up anymore. It is pulling ahead on the one thing that actually annoys people daily.