Samsung in talks with Japanese battery supplier for the Galaxy S833
Prolific leakster @evleaks claims that the Samsung Galaxy S8 and S8 Plus will be powered by 3000 mAh and 3500 mAh capacity batteries, respectively. At the same time, Korean media suggests 3250 mAh and 3750 mAh capacities. Both variants are adequate for coaxing good battery life out of the smartphones, which will be powered by energy-efficient 10nm processors.
Samsung will announce the Galaxy S8 and S8 Plus in March. It's rumored that the first official glimpse at them will be revealed at MWC 2017 (this month) in the form of a short "teaser" video.