iPhone 6, 6s,7,8,X,XS Battery Case

1. Data Sync & Portable built-in 4000(mAh): Add extra 150% backup battery for iPhone wherever you need it. Perfect for traveling, camping, business trip or other outdoor occasions. Thin and fits in your hands well. Easy to carry. 2. Led power Indicator: This battery case pack features 4 LED battery level indicator letting you know exactly the power you have (25%--50%--75%--100%); besides, you could switch on/off the battery case with the power switch button.