The Asus ROG Phone 3 will have a 6.59-inch display and a 5,800 mAh, according to a TENAA listing. The ROG Phone 3 will be a dual-SIM dual-standby 5G-capable device featuring 2x2 Wi-Fi 6 ax, 30 W fast charging and is expected to launch with Android 10 some time by end of this month or early July.
https://www.notebookcheck.net/Asus-ROG-Phone-3-TENAA-certification-confirms-a-6-59-inch-display-and-5-800-mAh-battery.470773.0.html