Redmi K90 Max Goes All-In on Power – Massive Battery and Fan Cooling Revealed

Redmi has launched the K90 Max in China, adding it to the growing K90 lineup alongside the Redmi K90 and K90 Pro Max. The new phone brings a 6.83-inch display with a 165Hz refresh rate, an 8,550mAh battery with 100W wired fast charging, and a MediaTek Dimensity 9500 SoC with up to 16GB of RAM. Other highlights include a Bose-tuned speaker system and a dual rear camera setup led by a 50-megapixel primary sensor.

Redmi K90 Max Price and Availability

The Redmi K90 Max starts at CNY 2,999 for the 12GB RAM + 256GB storage configuration. Both the 12GB + 512GB and 16GB + 256GB variants are priced at CNY 3,499. Moving up, the 16GB + 512GB model costs CNY 3,999, while the top-tier 16GB + 1TB variant is priced at CNY 4,699. The phone comes in three colour options: Space Silver, Shadow Black, and Sky Blue (translated from Chinese).

Redmi K90 Max Specifications and Features

The dual-SIM Redmi K90 Max runs Android 16-based HyperOS 3. Its 6.83-inch 1.5K (1,280 x 2,772 pixels) M10 display supports up to 165Hz refresh rate, a 480Hz touch sampling rate, 3,500Hz instantaneous touch sampling, 480Hz multi-finger touch sampling, and peaks at 3,500 nits brightness. The panel also carries HDR10+ and Dolby Vision certification.

Under the hood sits a MediaTek Dimensity 9500 chipset, paired with up to 16GB of LPDDR5x RAM and up to 1TB of UFS 4 storage. A dedicated D2 display chip handles gaming-focused processing. Thermal management is taken seriously here — the phone features a 6,000 sq mm ice-sealed circulating cooling pump and over 12,000 sq mm of graphite coverage, plus an active cooling fan that Redmi claims can bring temperatures down by around 10°C in just 100 seconds.

The rear camera system consists of two sensors: a 50-megapixel main camera with OIS and an f/1.68 aperture, backed by an 8-megapixel secondary shooter. On the front, a 20-megapixel camera covers selfies and video calls. Audio is handled by a 1115x symmetrical stereo dual-speaker setup, co-tuned with Bose.

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Connectivity is comprehensive, covering 5G, Wi-Fi 7, Bluetooth 4, NavIC, GPS/AGPS, Galileo, GLONASS, BeiDou, NFC, OTG, and USB Type-C. The phone carries IP66, IP68, and IP69 ratings for dust and water resistance. Security is managed by a 3D ultrasonic in-display fingerprint sensor, and the onboard sensor array includes an accelerometer, ambient colour temperature sensor, electronic compass, gyroscope, IR remote control, flicker sensor, and an X-axis linear motor.

Powering everything is the 8,550mAh battery, which supports 100W wired fast charging and 22.5W reverse wired charging for topping up other devices on the go.