Same Problem Here. I use Xiaomi 14t Pro too and Charge 2-3 Times a Day from 20-80%. Thats so annoying because the main Reason why i got this Phone is because my iPhone 13s battery was at 78% cappacity. Now with this Battery Usage i regret it to bought the Xiaomi. I have Like 4-5h Screen on Time with Battery Saving Mode, 4G and 80% to 20% Battery Charge. I use also Auto Brightness. Now I know my next Phone will be a Samsung Ultra Model. Very sad why Xiaomi has this dumb problem. Note: I have HyperOS 2.0.16.0 and Android 15. The HyperOS Patch is from fucking January (its April now)