4000mAh High Capacity Last LongerEquipped with a powerful 4500mAh built-in lithium battery, add more than 150%+ power for your iPhone XR, effectively extend the battery life. Perfect for traveling, camping, business trip or other outdoor occasions. 4500mAh High Capacity Last LongerEquipped with a powerful 4500mAh built-in lithium battery, add more than 150%+ power for your iPhone XR, effectively extend the battery life. Perfect for traveling, camping, business trip or other outdoor occasions. 4500mAh High Capacity Last LongerEquipped with a powerful 4500mAh built-in lithium battery, add more than 150%+ power for your iPhone XR, effectively extend the battery life. Perfect for traveling, camping, business trip or other outdoor occasions. Advanced Sync-through TechnologyThanks to the amazing sync-through technology, you can charge your iPhone XR and battery charger case simultaneously, and easy to sync your iPhone data to your Macbook, PC or laptop without removing the battery case. 4 LED indicators lights conveniently show you the battery level(25%--50%--75%--100%).