OnePlus is reportedly testing a new mid-size, performance-focused smartphone, based on new leaks. The purported handset is said to be evaluating a 6.59-inch 1.5K LTPS flat display from a domestic supplier and could support batteries starting at 8,000mAh. Earlier leaks also pointed to a larger 6.78-inch prototype with a MediaTek Dimensity 9500 chipset, advanced cooling…OnePlus is reportedly testing a new mid-size, performance-focused smartphone, based on new leaks. The purported handset is said to be evaluating a 6.59-inch 1.5K LTPS flat display from a domestic supplier and could support batteries starting at 8,000mAh. Earlier leaks also pointed to a larger 6.78-inch prototype with a MediaTek Dimensity 9500 chipset, advanced cooling…