VISUN&trade; 2600mah Power Bank Cylindrical Shaped Portable External Battery Backup Charger with Waterproof Bag (Yellow) Sleek compact, Stylish, tiny and light-weighted design (cigar / lipstick like) Compatible with all mobile phones charged by USB port Reliable Lithium-ion battery ensures high quality Long lifespan, recharging for over 1000 times When using, iphone users need to use your own USB data cable, thanks!!!