Earlier today, Galaxy Club has released some information on the upcoming S21 series. The Galaxy S21+ will have a 4660mAh battery and an estimated value at 4800mAh. The S20 Plus is at 4370mAh and estimated at 4500mAh. Hence it may pack more power in the new version.
Spec wise, the Galaxy S21 will be powered by Exynos 1000 SoC. It is equivalent with Snapdragon 875 with 5nm architecture. Both will compete for the best SoC in 2021.
Furthermore, it is also leaked that the Galaxy S1 Ultra supports 60W wired quickcharge and it is the fastest charging smartphone in Galaxy series.