Features:

MORE THAN 300% CHARGE: Powerful rechargeable 3500mAh(4.7"for iPhone 6S/6/7/8)  and  4000mAh(5.5"for 6 plus/6s plus/7 plus/8 Plus) battery case helps keep your phone charged the entire day.

ULTRA SLIM PROTECTION: 360° scratch-guard protection. Compact design minimizes bulk and weight for iPhone 6S/6 and iPhone 6 plus / 6s plus charger case. Also can protect your iPhone from any scratches.

EASY INSTALLATION: Insert your iPhone 6S/6/7 and 6s plus/6 plus/7 plus into the lightning output port. The extended battery case uses a micro USB input port to enable recharging and data transfer. You can conveniently charge and sync both the battery case and iPhone to your Macbook, PC or laptop without having to remove the battery case.

POWER LED INDICATOR - Will indicate the level of power your battery case is currently charged

Specification:

Capacity: 2500mAh(4.7"for iPhone 6S/6/7) and 3500mAh(5.5"for 6 plus/6s plus/7 plus)

Weight: 2500mAh(4.7") 80g,  3500mAh(5.5") 104g

Input Voltage: DC 5.0V/1.5A 

Output Voltage: DC 5.0V/1A .

Charging Power Level: 1 Light = 25%, 2 Lights = 50%, 3 Lights = 75%, 4 Lights = 100%