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Tipster Digital Chat Station says a new performance-focused phone is coming that combines a huge battery with a surprisingly thin body. According to a Weibo post, the unnamed device packs a 10,000mAh cell, supports 100W wired charging and full-speed wireless charging — all while keeping the chassis under 8.5mm.
Big battery, light feel: engineering the trade-offs
That 10,000mAh claim would be a major leap from the current Redmi K90 Pro Max, which uses a 7,560mAh pack. Earlier chatter floated an 8,000mAh figure, but this latest leak suggests Xiaomi (or a Redmi sub-brand) found space for an even larger cell without surrendering ergonomics. When a commenter suggested increasing thickness to 9.5mm for more capacity, the tipster replied by asking if people would "completely give up in-hand feel," pointing to a deliberate focus on comfort and handling.
Alongside endurance, the phone reportedly won’t skimp on charging speed: 100W wired and full-speed wireless charging are on the spec sheet, promising quick top-ups despite the massive capacity. In real-world terms, that could mean multi-day battery life for heavy users and very fast recharge windows — a compelling combination for power users and travelers.
Performance hardware and display
Digital Chat Station also hinted the model belongs to a performance sub-series and expects flagship-level silicon, likely a MediaTek Dimensity 9-series chipset rather than mid-range Snapdragon or Dimensity 8000-class chips. The tipster even shrugged off suggestions of mid-range processors with a rhetorical, "Don’t you want a top-tier processor?" — a clear nudge toward premium internals.
Leaked display details point to a newly developed flat panel around 6.8X inches with a 1.5K resolution and a 165Hz LTPS refresh rate. Additional touches include a metal frame, ultrasonic in-display fingerprint sensor and enhanced water and dust resistance — a spec mix aimed at users who want flagship features and marathon battery life.
It’s not just Redmi chasing this trend. OnePlus is reportedly planning a 9,000mAh battery for an upcoming Turbo midrange line, signaling a broader industry shift toward endurance-first phones that still offer high-refresh-rate displays and strong performance.
No official launch date or pricing has been revealed yet, but if these leaks hold up the Redmi K90 Ultra could reshape expectations for how much battery manufacturers can squeeze into a slim phone without compromising feel or speed.
Source: gizmochina
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