A new leak has provided some information on the battery capacities of two devices Xiaomi has in the works. The source fails to specify what devices they refer to exactly, but claims they'll be launched under the Redmi brand, perhaps hinting at the upcoming Redmi K50 series.
https://www.notebookcheck.net/Redmi-K50-series-potentially-set-to-debut-with-the-biggest-batteries-on-a-premium-Xiaomi-phone-yet.575454.0.html