Nubia NaviX Ultra packs a 7,100mAh battery into an 8mm body — and uses China-made memory chips
China's Nubia is launching the NaviX Ultra on September 16, 2026, and the headline spec is one that most flagship phones still haven't cracked: a 7,100mAh battery in a body just 8mm thin. That puts it in an unusual position — the battery capacity of a rugged outdoors phone, in something that looks like a regular slim flagship. It won't be available in the US or UK at launch, but the engineering choices here are worth watching.
The battery claim
Most slim Android flagships top out around 5,000–5,500mAh. Nubia is claiming 7,100mAh at 8mm, which would be a genuine engineering achievement if it holds up in testing. The phone runs on Qualcomm's Snapdragon 8 Elite Gen 5 — the same chip arriving in 2026 flagships from Samsung, Xiaomi, OnePlus, and others — so on raw performance, it's in the right tier.
The domestic chip angle
The bigger geopolitical story is the memory. NaviX Ultra is the first mass-produced smartphone to use LPDDR5X chips from ChangXin Memory (CXMT), a Chinese manufacturer. CXMT claims its chip hits 10,667 Mbps — about 25% faster than the LPDDR5X-8533 standard — while using 30% less power than conventional LPDDR5. The phone ships with up to 16GB of RAM and starts at 512GB of storage.
This matters beyond the spec sheet. Samsung and SK Hynix currently dominate the global memory market. Nubia's choice to use CXMT chips — developed jointly with ZTE — is a direct response to US semiconductor export controls and a signal of where Chinese phone makers are heading on supply chains.
The rest of the package
The display is a flat 6.78-inch OLED running at 1.5K resolution and 144Hz. Camera specs are still slightly unclear ahead of launch — reports vary between a triple and quad 50MP rear setup — but Nubia is billing each sensor as a full-resolution unit rather than a mix of primary and auxiliary lenses. AI duties are handled by Doubao, an assistant built by ByteDance and integrated into the OS through a collaboration between Nubia, ZTE, and ByteDance.
No pricing has been confirmed globally. A leak out of India suggested around ₹89,990, but Nubia hasn't verified that figure. For now, the NaviX Ultra is a China-only story — though its memory chip strategy is one the broader industry will be tracking closely.