How it work ?: Slide your iPhone X/XS into the charging port from top to bottom, then lightly press the phone after the charging port was inserted, finally press the key ofpower to turn on the back switch. After the indicator lights up will start charging, Please note when dismounting battery case, please don’t warp your iPhone in huge angle, or the connector of battery case will be broken.please take a look at picture 2 to correctly install way. Physical Protection: Certificated by CE, FC and RoHS. The inner smart security chip protects your iphone X/XS against short-circuiting, overheating or over-charging.The design of shockproof will protect your iPhone X/XS effectively.and It supports syncing data to your Macbook, PC or laptop. 6500mAh Ultra-High Capacity: This iPhone X/XS battery case has powerful 6500mAh huge capacity, can provide extra 24 hours talktime, 18 hours video payback time and 5 hours 3D gaming,will charges the iPhone XS/X almost twice times.an excellent extend smart charger case offer smart life fro you.(the above data not included play the phone when charging.) It also has highest industry regulatory certificates: CE, RoHS, and FCC, enough safe that you can rest assured to use. Specifically Designed for iPhone X/XS: Eco-friendly iPhone X/XS charging case; Made with high quality and durable silicone material; The perfect size and 360 silicone pad around will increase the buffer can protect mobile phone well; Ultra slim and light-weight,convenient to hold in your hand or in your pocket, you can enjoy the fun of charging anytime, anywhere Perfect warranty1 x iPhone X / XS Battery Case 6500mAh , 1 x User Manual. Also you will receive 18 months warranty and 30-days hassle-free return service. Just feel free to contact us first if you have any product problem.and contact the seller-support to help you registered the support Services for free.