The Redmi 15 (4G/5G) features a massive 7,000mAh battery with 33W charging, a 6.9-inch 144Hz FHD+ display, and a 50MP AI dual camera. Powered by a Snapdragon 685 (4G) or 6s Gen 3 (5G) chipset, it offers up to 16GB virtual RAM, 256GB storage, and IP64 resistance. It runs on HyperOS 2.0 based on Android 15.