Duracell Rechargeable Portable USB Power Bank 4000 mAh for use with iPhone, iPad, iPod, BlackBerry, Samsung, LG, Motorola, Nook (Silver) Trust The Power Within, With Duracell Rechargeable Power Pack 4000mAh of capacity. Charges all iPhone's Two to Three times, a Galaxy S3 Twice, or an iPad / iPad 2 once. Super-fast charge output (5V/2.1A) though USB port (5V/2.1A ) allow for charging of your iPad, iPhone, Android, and more at high speed. Recharges Rapidly Thru Any USB Port or Outlet