ROMOSS iPhone 7 Plus Battery Case, Compact Extended Battery Case for iPhone 7 Plus (5.5 inch) with 3800mAh Capacity/100% Extra Battery (Black) 100% Longer Battery Life: 3800mAh capacity provides an extra 60 hours audio, 17 hours 3G talktime, 13 hours video, 12 hours web browsing or 3 hours 3D gaming to your iPhone 7 Plus. Please take the battery case off if you want to listen to music. Sync & Charge: Complete charge and sync compatibility with the iPhone 7 Plus via your own lightning cable (no need to remove battery case). Built-in Magnetic Metal: Work well with any magnetic car mount holder for iPhone, free your hands to use navigation software while driving. Full Protection: Provide full protection to corner and side from scratches, scrapes and drops. Deluxe baby skin exterior provides comfortable grip. What You Get: ROMOSS Battery Case for iPhone 7 Plus, user manual, 12 months warranty and friendly customer service.