CNET has released a battery life report covering 32 smartphone models available in the US market. The testing process involved a total of over 120 hours of operation across 28 new devices released in 2026 and 4 older models.
The evaluation consisted of two primary tests: a 3-hour video streaming session at maximum screen brightness and a 45-minute stress test involving gaming, video calls, and social media usage.
The iPhone 18 Pro Max demonstrated the best overall performance. In the 45-minute stress test, it lost only 1% of its battery, tying with the iPhone Duo. The Google Pixel 11 Pro XL followed with a 3% drain.
During the 3-hour video streaming test, the iPhone 18 Pro consumed 6% of its battery. Analysts attribute the performance of the iPhone 18 Pro Max to its battery capacity, iOS 27 optimizations, and the A20 Pro chip.
The report notes that increased power consumption from brighter displays and AI features has kept average battery life for 2026 models consistent with those from 2024 and 2025. Silicon-carbon batteries are emerging as a key trend.
Devices such as the Motorola Razr 2026 and Samsung Galaxy Z Fold 8 have already integrated silicon-carbon battery technology. CNET expects wider adoption of this battery type by manufacturers starting in 2027.
