[ IMPORTANT NOTE ]:①This battery case 7800mah only fit for iPhone 11 Pro Max (6.5 inch), Not works on iPhone 11 or iPhone 11 Pro. ② Not compatible with iPhone lightning headphone or traditional 3.5mm headphones. ONLY works with Apple Airpods or other wireless Bluetooth headphone. | [ LONG CHARGING LIFE]:This rechargeable powerful high capacity 7800mAh iPhone 11 Pro Max Li-polymer backup charging case can effectively provide 200% +extra battery life for your phone,up to 17 hours Talk time, 18 hours on web browsing time ,60 hours listen music ,18 hours video,5 hours 3D playing games. | [ 360° PROTECTING AND CHARGING 2 IN 1 ]: Built in internal high quality chips can prevents your phone battery short-circuiting, overheating and over-charging.360° full bumper design and hard shell back to protect your phone from scratches and other daily wear and tear(Not include phone screen). | [ADVANCED SYNC-THROUGH TECHNOLOGY ]: You can sync your iPhone 11 Pro Max to your Mac book,PC or laptop without take off the battery cover.also 100% compatible with all iOS versions and future iOS software updates,not compatible with Apple CarPlay. | 5.[ PERFECT SERVICES ]: We always strive to offer the best customer service, If you are not 100% satisfied with the battery case, please feel free to contact us. We will solve your problem within 24 hours,we will give you a satisfactory solution!