The battery for the iPhone 16 Pro Max is a lithium-ion (Li-ion) type with a nominal capacity of 4,685 mAh. Its operational voltage is ~3.83V, and the total energy it can store is approximately 17.9 Wh. Apple states that the combined operation of the A18 Pro processor and iOS power management provide excellent battery life, lasting up to 29 hours for video playback and up to 105 hours for audio playback. It supports fast wired USB-C charging (20–25W) and MagSafe wireless charging up to 25W.