The Xiaomi Redmi K80 Ultra arrives as one of the most aggressively specced performance phones of 2025, packing a MediaTek Dimensity 9400+ flagship chip, a huge 7410 mAh silicon-carbon battery, and a 6.83-inch 144Hz OLED into a body that still carries IP68 protection. Announced on June 26, 2025, it lands with an approximate price of about 310 EUR, positioning it as a value flagship that undercuts more expensive rivals while matching many of them on raw hardware.
What makes the K80 Ultra interesting is not any single headline number but how it balances them: peak brightness rated at 3200 nits, storage that scales all the way to 1TB with 16GB of RAM, and 100W wired charging. This article looks past the spec sheet to explain what those numbers mean in daily use and who this phone is actually built for.
Full Specifications
Network
| Technology | GSM / CDMA / HSPA / CDMA2000 / LTE / 5G |
| 2G bands | GSM 850 / 900 / 1800 / 1900 |
| CDMA 800 | |
| 3G bands | HSDPA 800 / 850 / 900 / 1700(AWS) / 2100 |
| CDMA2000 1x | |
| 4G bands | 1, 3, 4, 5, 7, 8, 18, 19, 26, 28, 34, 38, 39, 40, 41, 42, 48, 66 |
| 5G bands | 1, 3, 5, 7, 8, 26, 28, 38, 40, 41, 48, 66, 77, 78 SA/NSA |
| Speed | HSPA, LTE, 5G |
Launch
| Announced | 2025, June 26 |
| Status | Available. Released 2025, June 26 |
Body
| Dimensions | 163.1 x 77.9 x 8.2 mm (6.42 x 3.07 x 0.32 in) |
| Weight | 219 g (7.72 oz) |
| Build | Glass front, aluminum frame |
| SIM | Nano-SIM + Nano-SIM |
| IP68 dust tight and water resistant (immersible up to 2m for 30 min) |
Display
| Type | OLED, 68B colors, 144Hz, Dolby Vision, HDR10+, HDR Vivid, 1800 nits (HBM), 3200 nits (peak) |
| Size | 6.83 inches, 114.5 cm2 (~90.2% screen-to-body ratio) |
| Resolution | 1280 x 2772 pixels, 19.5:9 ratio (~447 ppi density) |
| Protection | Scratch/drop-resistant glass |
Platform
| OS | Android 15, HyperOS 2 |
| Chipset | Mediatek Dimensity 9400+ (3 nm) |
| CPU | Octa-core (1×3.63 GHz Cortex-X925 & 3×3.3 GHz Cortex-X4 & 4×2.4 GHz Cortex-A720) |
| GPU | Immortalis-G925 |
Memory
| Card slot | No |
| Internal | 256GB 12GB RAM, 256GB 16GB RAM, 512GB 12GB RAM, 512GB 16GB RAM, 1TB 16GB RAM |
| UFS 4.1 |
Main Camera
| Dual | 50 MP, f/1.9, 23mm (wide), 1/1.55", 1.0µm, PDAF, OIS 8 MP, 119˚ (ultrawide), 1/4.0", 1.12µm |
| Features | Color spectrum sensor, Dual-LED dual-tone flash, HDR, panorama |
| Video | 8K@30fps, 4K@30/60fps, 1080p@30/60/120/240/960fps, gyro-EIS |
Selfie camera
| Single | 20 MP, (wide), 1/2.0", 0.8µm |
| Features | HDR |
| Video | 1080p@30/60fps |
Sound
| Loudspeaker | Yes, with stereo speakers |
| 3.5mm jack | No |
| 24-bit/192kHz Hi-Res & Hi-Res Wireless audio |
Comms
| WLAN | Wi-Fi 802.11 a/b/g/n/ac/6/7, dual-band, Wi-Fi Direct |
| Bluetooth | 5.4, A2DP, LE, LHDC 5 |
| Positioning | GPS (L1+L5), BDS (B1I+B1C+B2a+B2b), GALILEO (E1+E5a+E5b), QZSS (L1+L5), NavIC, GLONASS |
| NFC | Yes |
| Infrared port | Yes |
| Radio | Unspecified |
| USB | USB Type-C |
Features
| Sensors | Fingerprint (under display, ultrasonic), accelerometer, gyro, proximity, compass |
Battery
| Type | Si/C Li-Ion 7410 mAh |
| Charging | 100W wired, PD3.0 Bypass charging |
Misc
| Colors | Gray, White, Blue, Green |
| Price | About 310 EUR |
Price and Availability
The Xiaomi Redmi K80 Ultra offers a compelling combination of features and performance. While the base price is around €310, the actual cost may vary depending on your location and retailer. Below, you’ll find the approximate price of the Xiaomi Redmi K80 Ultra converted into various currencies. Please note that these are estimates based on recent exchange rates as of July 13, 2026 and may not reflect the exact price you’ll find at a retailer.
- United States: $354
- Japan: ¥57,233
- United Kingdom: £264
- Australia: A$509
- Canada: C$501
- Taiwan: NT$11,360
- Denmark: kr2.313
- Saudi Arabia: ﷼1,326
- South Korea: ₩531,829
- Germany: €310
- Brazil: R$1.812
- Vietnam: ₫9.263.750
- Kenya: KSh 45,754
- India: ₹33,729
- Indonesia: Rp 6.406.054
- Nigeria: ₦486,048
- Pakistan: ₨98,339
- Philippines: ₱21,784
- Bangladesh: ৳৪৩,৫৯৬
Value: What About 310 EUR Really Buys
At roughly 310 EUR, the Redmi K80 Ultra sits in territory usually occupied by upper-midrange devices, yet its component list reads like a proper flagship. A current-generation Dimensity 9400+ chipset, UFS 4.1 storage, LPDDR5X-class memory tiers, and IP68 ingress protection are rarely bundled together at this price. For buyers who prioritize internal hardware over brand prestige, that combination is the phone’s core argument. Pricing and availability can shift by region and over time, so treat the EUR figure as an indicative starting point rather than a fixed global price.
(Suggested image placement: front-and-back product shot of the Redmi K80 Ultra showing the display and rear camera module.)
Design and Build Quality
The K80 Ultra measures 163.1 x 77.9 x 8.2 mm and weighs 219 g, so it is a substantial handset — the weight largely a consequence of the oversized battery. Xiaomi pairs a glass front with an aluminum frame and adds scratch- and drop-resistant glass over the panel. The IP68 rating (immersion up to 2m for 30 minutes) is notable at this price, since many competitors in the same bracket settle for splash resistance only. It offers Nano-SIM dual-SIM support but no microSD expansion, so buyers should size their storage tier carefully at purchase.
Display: A Standout 144Hz OLED
The 6.83-inch OLED is one of the phone’s strongest features. It runs at up to 144Hz, covers a 1280 x 2772 resolution (~447 ppi), and supports Dolby Vision, HDR10+, and HDR Vivid. Rated brightness reaches 1800 nits in high-brightness mode and up to 3200 nits peak, which should make outdoor visibility and HDR playback genuinely impressive. With roughly 90.2% screen-to-body ratio, it is well suited to gaming and video, complementing the high refresh rate with the fluidity that a flagship chip can sustain.
(Suggested image placement: the phone displaying HDR content outdoors to illustrate peak brightness.)
Performance and Storage
Powering the K80 Ultra is the MediaTek Dimensity 9400+, built on a 3 nm process with an octa-core layout topped by a 3.63 GHz Cortex-X925 core and backed by the Immortalis-G925 GPU. This is one of the most capable Android chipsets available, so demanding games and multitasking should be handled comfortably. Buyers can choose from 256GB/12GB up to 1TB/16GB configurations on UFS 4.1 storage — a range that easily covers everyone from casual users to media hoarders and mobile gamers.
Cameras: Practical Rather Than Flashy
The rear setup is a dual system: a 50 MP f/1.9 wide with a 1/1.55-inch sensor, PDAF, and OIS, joined by an 8 MP 119-degree ultrawide. There is no dedicated telephoto, which is the clearest sign of where Xiaomi trimmed costs, but the main sensor is sizable and stabilized for reliable everyday shots. Video tops out at 8K@30fps with 4K up to 60fps and gyro-EIS, while the 20 MP front camera handles selfies and 1080p video. A color spectrum sensor should aid white balance accuracy.
Battery and Charging Endurance
The 7410 mAh Si/C Li-Ion battery is the headline number here and one of the largest in any 2025 flagship-class phone. Combined with the efficient 3 nm chipset, it should deliver strong multi-day potential for lighter users and full heavy days for gamers. Charging is handled at 100W wired with PD3.0 and Bypass charging, the latter useful for reducing heat and battery wear during long gaming sessions. There is no wireless charging listed, a common trade-off in this segment.
Software and Connectivity
The phone ships with Android 15 under HyperOS 2, Xiaomi’s latest interface. Connectivity is comprehensive: Wi-Fi 7, Bluetooth 5.4 with LHDC 5, multi-band GNSS including dual-frequency GPS (L1+L5), NFC, an infrared port, and USB Type-C. Stereo speakers plus 24-bit/192kHz Hi-Res and Hi-Res Wireless audio round out the media credentials, though there is no 3.5mm headphone jack. An under-display ultrasonic fingerprint sensor adds a premium touch usually reserved for pricier phones.
Who Should Buy the Redmi K80 Ultra
This phone is aimed at performance-focused buyers who want flagship silicon, a top-tier display, and exceptional battery life without paying flagship prices. Mobile gamers, heavy multitaskers, and anyone frustrated by mediocre endurance will find a lot to like. Photography enthusiasts who rely on optical zoom, or shoppers who require wireless charging or expandable storage, may want to weigh alternatives before committing.
Conclusion
The Xiaomi Redmi K80 Ultra is a compelling value flagship that leads with a Dimensity 9400+ chip, a bright 144Hz OLED, and a massive 7410 mAh battery, all wrapped in an IP68-rated body at an approximate 310 EUR. Its main compromises — no telephoto camera, no wireless charging, and no microSD slot — are reasonable given the price. If you want maximum performance and endurance for the money and can live without a zoom lens, it is an easy recommendation; confirm current pricing and regional availability against official Xiaomi and reputable sources before buying.
References
- Xiaomi China – REDMI K80 Ultra specifications – Primary manufacturer specs page for display, chipset, cameras, battery, charging, dimensions, storage variants, and official product claims.
- Xiaomi China – REDMI K80 Ultra product page – Official product overview page useful for confirming the device identity, market name, launch positioning, colors, and feature highlights.
- MediaTek – Dimensity 9400+ (mediatek.com) – Primary chipset source for verifying Dimensity 9400+ CPU, GPU, AI, connectivity, imaging, and platform capabilities used by the phone.
- TENAA – China telecom equipment certification database (tenaa.com.cn) – Official Chinese regulator source for cross-checking certified device details such as model identifiers, network support, dimensions, battery capacity, and radio-related specifications.
- GSMArena (gsmarena.com) – Established phone specifications database useful as a secondary cross-check against official Xiaomi and regulatory data.
