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.
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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.
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Meanwhile, the top-line 16GB + 512GB model is priced at 5,499 yuan (~$820), and the 16GB + 1TB variant costs 5,999 yuan (~$890).