Leak: Android flagships may get 10,000mAh batteries using Apple's steel-case tech

Chinese Android makers are reportedly testing rigid steel-cased batteries combined with stacked-cell technology to push flagship capacities to 9,000–10,000mAh. The approach, used by Apple in the iPhone 17 and 18 Pro, improves energy density and heat dissipation but adds weight and tightens internal assembly constraints.

• A Chinese OEM, likely Xiaomi, is testing a 9,000–10,000mAh steel-cased stacked-cell battery
• Apple's iPhone 18 Pro Max uses a steel-encased cell rated at about 5,391mAh
• Xiaomi 18 Pro Max already ships with an 8,500mAh battery in China
• Steel casings improve rigidity and heat dissipation but add weight