The iPhone 15 Pro Max mobile battery is a lithium-ion (Li-ion) type with the following features:
- Capacity: 4,422 mAh
- Voltage: 3.9V
- Energy: 17.32 Wh
- Battery life: 29 hours of video playback, 95 hours of audio playback
- Fast charging: up to 25W
- Wireless charging: MagSafe 15W