Kate Spade New York - Portable Backup Battery Bank with Zebra Design, 4000mAh Compatible with most USB-powered cell phones To keep your phone charged and ready for use. Rechargeable 4000 mAh lithium-polymer battery Along with a 2.1-amp output provides rapid power replenishment while you're out and about. 4 LED indicators Keep you apprised of the battery's status. Compact design Enables easy storage and portability. Dim: 4in x 2.25in x 0.5in Full-wrap kate spade new york graphic print Provides a fashionable appearance.