The phone packs a larger 9,070mAh battery with 16% silicon content.
It supports the same 100W wired charging, 50W wireless charging, 27W wired reverse charging, and 22.5W wireless reverse charging as the Redmi K100 Pro.
Despite the larger battery and display, the Pro Max is 8.45mm thick and weighs 238 grams.
It uses a glass fiber back cover and comes in black, gold, blue, and red color options.
The Pro Max also gets several connectivity and audio upgrades, including a USB 3.2 Gen 1 interface and a 2.1-channel speaker system made up of dual 1115D master-level speakers and Deco 2016 tablet-level speakers.
Like the standard model, it features an ultrasonic fingerprint sensor, IP66/IP68/IP69 protection, and HyperOS 3.0.
Redmi K100 Pro and Pro Max pricing
The Redmi K100 Pro starts at 3,699 yuan (~$550) for the 12/256GB storage version.
The 12/512GB model costs 4,099 yuan (~$610), while the 16/256GB version costs 4,299 yuan (~$640).
The top-end 16/512GB variant is priced at 4,699 yuan (~$700).
The Redmi K100 Pro Max retails at 4,499 yuan (~$670) for the 12/256GB model, 4,899 yuan (~$730) for the 12/512GB version, and 5,099 yuan (~$760) for the 16/256GB model.
Meanwhile, the top-line 16GB + 512GB model is priced at 5,499 yuan (~$820), and the 16GB + 1TB variant costs 5,999 yuan (~$890).