Incipio Battery Charger Case for Samsung Galaxy S6 & S6 Edge - Retail Packaging - Black Doubles surfing, downloading and streaming powered by an ultra-thin 3700mAh Lithium-Polymer battery Built-in micro SD* card slot expands the onboard storage of your device up to 128GB (*micro SD card not included) Supports Quick Charge 2.0 and Samsung Fast Charging pass-through allowing your phone to rapidly charge while connected to the battery case (requires Quick Charge 2.0 or Fast Charge compatible charger) Includes additional bumper compatible with Samsung Galaxy S6 edge