The iPhone 15 battery is a lithium-ion (Li-ion) type with 3,349 mAh capacity, 3.9V voltage, and 12.98 Wh energy. It is paired with the A16 Bionic processor manufactured using the 4nm process, offering energy efficiency. The battery life reaches up to 20 hours of video playback and 80 hours of audio playback. It supports fast charging and wireless charging with MagSafe 15W.