Pre-owned Redmi K90 Pro Max

Redmi K90 Pro Max (POCO F8 Ultra) – Features an even bigger 7560 mAh battery (typ) / 7420 mAh (min), delivering extended power for demanding tasks and gaming.

Color Options

• Black
• Stream Gold White
• Tech-Denim Blue (3rd-gen nano-leather, UV/scratch/chemical-resistant)
• Champion Edition (Lamborghini Squadra Corse co-branded: carbon-fiber texture, Y-shaped lines, exclusive themes)

Dimensions & Build

• Thickness: 7.9mm (Glass Fiber) / 8.3mm (Tech-Denim)
• Weight: TBD (Xiaomi Labs tested; varies by material)
• Material & Protection:
  • Front: Xiaomi Dragon Crystal Glass (scratch-resistant, hydrophobic coating)
  • Back: Glass Fiber (standard) / Tech-Denim Nano-Leather (special edition)
  • Middle Frame: High-strength 6-series aviation aluminum (4-curved wrapped design)
  • Dust & Water Resistance: IP68 rated (1.5m static freshwater for 30 mins per IEC 60529; resistance fades with wear)
  • Screen-to-Body Ratio: ~94% (ultra-narrow bezels)

Processor & Performance

• Chipset: 5th Gen Snapdragon® 8 Elite (2025 Xiaomi top-tier platform)
• Process: TSMC 3rd-gen 3nm
• CPU: Octa-core (2 super cores up to 4.6GHz; +17% multi-core performance vs. previous gen)
• GPU: Adreno 8-series (+23% performance, -35% power consumption)
• Co-Processor: AI Independent Display Chip D2 (33.5% anti-aliasing improvement, PC-grade visuals)
• Cooling System: 6700mm² 3D Ice-Cool Heat Dissipation (dual-stage boss design, +40% heat conduction; 14+ NTC sensors)
• Performance Boosts:
  • New Rage Engine (reduces frame drops; ~59.6fps in heavy 3D games)
  • AI Performance Scheduler (dynamic CPU/GPU/DDR tuning for efficiency)

Memory & Storage

• Options: 12GB+256GB, 12GB+512GB, 16GB+512GB
• Note: Available storage < total due to pre-installed Xiaomi HyperOS 3 & apps

Display – 6.9" Super Pixel Eye-Care OLED

• Size: 6.9-inch OLED straight screen (immersive, one-hand friendly)
• Resolution: 2608 × 1200 pixels
• Pixel Arrangement: Full RGB (lossless display, 9.38M sub-pixels)
• Key Features:
  • Refresh Rate: Up to 120Hz (adaptive)
  • Touch Sampling: 480Hz (2560Hz instant for gaming)
  • Brightness: 3500nits peak, 600nits typical
  • Color: 12-bit (68.7B colors), 100% P3 gamut, Delta E≈0.459, JNCD≈0.39
  • Eye Care: Xiaomi Qingshan Eye Care 3.0 (hardware low-blue light, flicker-free, 1nit ultra-low brightness)

Camera System – 50MP Triple Rear Camera

Rear Camera:

• 50MP Light Hunter™ 950 Main Camera: 1/1.31" sensor, f/1.67, OIS, 23mm (1X); +43% light sensitivity
• 50MP 5X Periscope Telephoto: JN5 sensor, f/3.0, OIS, 115mm (5X); 10X lossless zoom, 30cm macro
• 50MP Ultra-Wide: OV50M sensor, 102° FOV, f/2.4, 18mm (0.7X)

Key Camera Features:

• Optical Coating Grand Slam (MgF₂/LSC/ALD/PVD/SWC; reduces glare)
• Xiaomi AISP 2.0 (AI large-model photography: FusionLM/ToneLM/ColorLM/PortraitLM 2.0)
• 4K video to live photo (up to 10s), Portrait Ultra-Clear Enhancement

Front Camera:

• 32MP Lens (Portrait Mode, HDR, Selfie Timer)

Video Recording

• Rear: 4K Dolby Vision HDR (24/30/60fps), 1080p (30/60fps); Super Steady Stabilization
• Front: 1080p (30/60fps); Video Teleprompter, Slow-Motion Selfie

Battery & Charging

• Capacity: 7560mAh (typ) / 7420mAh (rated) Xiaomi Jinshajiang Battery (Xiaomi’s largest mobile battery)
• Charging:
  • Wired: 100W HyperCharge (50% in ~20 mins; 100W PPS via OTA)
  • Wireless: 50W HyperCharge (requires Xiaomi-compatible charger)
  • Reverse: Up to 22.5W (wired/wireless; for Xiaomi-tested devices)
• Special Features: -25℃ extreme cold charging (+100% speed), Game Bypass Charging

Audio & Multimedia

• Sound System: 2.1 Stereo (symmetrical dual speakers + independent subwoofer; 2X bass vs. premium ¥10k phones)
• Tuning: Sound by Bose (Classic/Balanced modes)
• Enhancements: Dolby Atmos, 3D surround, 15-level equal loudness compensation
• Supported Formats: MP3/FLAC/AAC/OGG/WAV (audio); MP4/MKV/WEBM (video, HDR10+/Dolby Vision)

Security & Connectivity

• Security: Ultrasonic in-display fingerprint (wet-hand/strong sunlight support), AI Face Unlock
• NFC: Contactless payments, transit/door/car keys (via Mi Wallet)
• Network:
  • Dual SIM (nano-SIM + nano-SIM/eSIM; region-dependent)
  • Xiaomi Xingchen Communication (T1+/T1S chips; reduced lag on high-speed rail)
  • Wi-Fi 6/6E, Bluetooth 5.4, USB 3.2 Gen1 (5Gbps; 10X faster than USB 2.0)

Navigation & Sensors

• Navigation: Beidou, GPS, Galileo, GLONASS, QZSS, NavIC
• Sensors: Proximity/ambient light/accelerometer/compass/gyroscope; X-axis linear motor (+42.8% volume, +66.6% vibration)

Operating System

• OS: Xiaomi HyperOS 3
• Features: AI wallpaper, Smart Desktop, Xiaomi Super Island; Champion Edition exclusive (Lamborghini boot animation/charging effects/wallpapers)

In the Box

• Redmi K90 Pro Max (host)