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