Up to 2x charging vs. the wall (Based on 1.0A iPhone and Samsung Galaxy wall charging block versus the Duracell Powerbanks 2.4A output). Up to 2x extra charges (Based on internal testing vs. iPhone 8. Result may vary by device & conditions). Pre-charged & ready to use. Net contents: 1 lithium ion powerbank. 1 micro USB cable. For Apple, Android & Most USB-Powered Devices. 6,700 mAh (24.3 Wh). 1 USB port. Complaint carry-on. Duracell guarantees your satisfaction. If not completely with product, call 1-800-551-2355 (9 am - 5 pm EST). ETL listed - Intertek. www.duracell.com. For user instructionns and caution, go to www.duracell.com/en-us/powerbanks. Recycle battery according to local, state and national regulations. Made in China.