Next OnePlus Flagship Rumoured to Beat OnePlus 15 with 8,000 mAh Battery

OnePlus appears to be gearing up for a major leap beyond its forthcoming OnePlus 15. According to reliable leaks, the company is testing a performance-focused model that uses a flat 1.5K resolution display with a 165Hz refresh rate and the upcoming Snapdragon 8 Gen 5 chipset. More compellingly, the phone is said to include a battery with a capacity “starting with an 8” — meaning 8,000 mAh or more — positioning the device as OnePlus’s endurance flagship. The timing suggests this phone would arrive after the OnePlus 15 and/or the Ace-series sibling, likely in late 2025 or early 2026. The potential size of the battery would eclipse the OnePlus 15’s rumored 7,300 mAh pack, signalling a deliberate push for longer runtime rather than just raw speed. OnePlus is known for finding balance between performance, charging speed and design; any jump to an 8000 mAh-class battery will need trade-offs in thickness, weight and thermal design. If the leaks hold true, the phone could become the brand’s “go-to” for users who prioritise all-day use, high-refresh gaming, and sustained performance. For the broader market, this move could raise the bar for battery and display specs under high-end Android phones — not just from OnePlus, but across competing brands seeking to match the specification set.