Redmi K90 Ultra will be launched by the Xiaomi sub-brand with an 8,500mAh or larger battery, a tipster claims. The Chinese smartphone maker will reportedly equip the rumoured handset with an octa core MediaTek Dimensity 9500 chipset, instead of Qualcomm’s octa core 3nm Snapdragon 8 Elite Gen 5 chipset found on the existing Redmi K90 lineup. Earlier, the Redmi K90 Ul…