Somewhere, a phone designer just won an argument they’ve probably been having for years: that “big battery” and “thin phone” don’t have to be enemies.
iQOO launched the Z11S in China on August 18, and it’s carrying a battery number that sounds like a typo until you check it twice — 10,000mAh, wrapped inside a body that’s just 8.59mm thick and weighs 225 grams. It’s the brand’s first phone to break the five-figure mAh mark, and it’s doing it at a starting price of 1,799 yuan, roughly $250. Read that again. That’s not flagship pricing. That’s “why would anyone buy anything else in this range” pricing.
The Battery Is the Whole Story — And iQOO Knows It
Let’s not bury the lead the way a press release would. The Z11S’s headline feature is a single-cell 10,000mAh unit iQOO calls the “Blue Ocean” battery, co-developed with CATL. It leans on fourth-generation silicon-anode technology and something iQOO is branding “cube packing” to squeeze that much capacity into a phone slimmer than most 6,000mAh devices on the market today. That’s the actual engineering flex here — not just a bigger battery, but a bigger battery that doesn’t punish you with a brick in your pocket.
The numbers iQOO is putting behind it are aggressive: up to 32 hours of calls, 29 hours of continuous video playback, and what the company is calling genuine multi-day endurance for anyone who isn’t gaming for six hours straight. Charging comes via 44W wired PD/PPS and UFCS support, with reverse wired charging thrown in — handy if you’re the friend everyone borrows a charge from at a party.
Is 44W slow compared to the 100W-plus charging showing up on pricier phones? Yes. But when the battery is this large, you’re simply not plugging in as often, which somewhat defuses the complaint before it lands.
Performance-Wise, It’s Not Just a Battery in a Shell
It would be easy for a battery-first phone to skimp everywhere else. The Z11S doesn’t, quite. It runs on MediaTek’s Dimensity 7500, a 4nm chip that iQOO says clears 1.3 million points on AnTuTu — respectable for this price bracket, and enough to run “Honor of Kings” at a smooth 120fps, which tells you exactly who this phone is trying to keep happy.
The display is a 6.83-inch AMOLED panel at 2800×1260 resolution with a 144Hz refresh rate, 2160Hz high-frequency PWM dimming, and a 94.47% screen-to-body ratio. iQOO is also pitching eye-comfort credentials here, pairing the high refresh rate with dimming tech meant to reduce strain during long sessions — a detail aimed squarely at the same gamers the chipset is courting.
Where the Corners Got Cut
No phone gets a 10,000mAh battery for free, and the Z11S makes its trade-offs fairly transparent. Charging tops out at 44W rather than the 100W-plus speeds becoming common in this segment — a reasonable exchange given how rarely you’ll need to plug in, but worth knowing if fast top-ups matter more to you than raw endurance. Camera details haven’t been fully confirmed at the primary-sensor level, though early expectations point to a 50MP main shooter, so this isn’t a phone built to chase photography flagships. And distribution, for now, is a China-only story — no word yet on whether the Z11S travels beyond its home market.
None of that undercuts what the phone is actually good at. It just means the Z11S knows exactly what it’s not trying to be.
Pricing of iQOO Z11S
Introductory price: 1,799 yuan (~$250)
Additional RAM/storage configurations expected to follow the standard iQOO Z-series tiering, though full pricing across variants hasn’t been fully broken out yet
At 1,799 yuan, iQOO isn’t just launching a phone — it’s setting a new floor for what “big battery” is supposed to mean in this price bracket, and every competitor in the segment now has to answer for it.
FAQ
10,000mAh — the largest battery iQOO has ever put in a smartphone, built with CATL using silicon-anode technology and a slim single-cell design.
The MediaTek Dimensity 7500, a 4nm chip scoring around 1.3 million on AnTuTu, tuned for smooth high-frame-rate gaming.
Just 8.59mm, weighing 225 grams — notably slim for a phone carrying a five-figure battery capacity.
1,799 yuan, roughly $250, for the introductory China pricing.Does the iQOO Z11S support fast charging? Yes, 44W wired charging with PD/PPS and UFCS protocols, plus reverse wired charging support.
