iBucks® 8800mah Mobile Charger (White) w/Digital Backlit LCD Display, Faux Leather housing - for iPhone 4/4S/5/5C/5S, Samsung S3/S4/S5, Note 2/3, and other smartphones and digital devices
Great product!  No more worries when I drain my batteries where no access to any power outlet is available.  Better yet, you can charge two devices at one time.  Compact and good quality.  Highly recommend!