Redmi K90 Ultra Review: 100W Charging and Big Battery, But Is It Enough?

Senja Arunika

Redmi K90 Ultra smartphone with 100W charging and large battery

The Redmi K90 Ultra has appeared on China’s 3C certification site, revealing 100W fast charging and a hefty 8,500mAh battery. This matters because it challenges the usual mid-range compromises with specs that flirt with gaming territory.

  • 100W wired fast charging confirmed by 3C certification
  • Snapdragon 8 Elite chipset expected under the hood
  • Massive 8500mAh battery, no wireless charging
  • Physical cooling fan and IP68/IP69 rating included
Redmi K90 Ultra matte finish and flat OLED screen
Matte finish body with a 1.5K flat OLED panel for punchy colors.

 

Flagship Power, Mid-range Compromises

According to leaks, the K90 Ultra features a Snapdragon 8 Elite chipset, a 1.5K flat OLED display with a high refresh rate, and dual stereo speakers. Sounds good on paper. The catch is simple: Xiaomi positions this below its existing K90 and K90 Max models, so expect some corners cut elsewhere—maybe in camera or software polish.

Redmi K90 Ultra large 8500mAh battery pack
Massive 8500mAh battery to keep heavy users going longer.

 

Battery Beast or Bulk with Downsides?

An 8,500mAh battery is a rare sight in this price tier, promising longer sessions for gamers and power users. But don’t hold your breath for the “all-day battery” claim—5G connectivity and high-brightness gaming will drain this pack faster than advertised. The 100W charging speeds are impressive but likely mean a three-hour recharge cycle, which is slow compared to flagship competitors.

Physical Cooling Fan: Gimmick or Game-Changer?

Including a built-in physical cooling fan is unusual outside true gaming phones. Xiaomi clearly wants to appeal to gamers, but this adds bulk and potential noise. Whether this fan will actually improve sustained performance or just be a marketing ploy remains to be seen.

No Wireless Charging, But IP68 Is a Plus

The phone skips wireless charging—a disappointment given the battery size and price. However, it does offer IP68/IP69 dust and water resistance, which is rare in this segment and will appeal to those wanting more ruggedness.

GizmoIndo’s Take

Xiaomi’s Redmi K90 Ultra aims to strike a balance—offering flagship-level chips and a massive battery at a mid-range price. But the lineup placement and missing features hint at compromises. The physical cooling fan is a curious addition, possibly indicating performance throttling issues with the Snapdragon 8 Elite. At roughly $410, it could attract gamers on a budget, but the slow charging and no wireless power may sting. This phone is a reminder that bigger batteries and faster specs don’t always translate to better real-world experience—especially when the marketing gloss meets mid-range reality.

(Via)

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