A powerbank can supply for iphone4s/5s charged twice.

A powerbank can supply for SAMSUNG Galaxy S4 charged about one time.

1.Battery Capacity:8000mAh

2.Real Capacity:5000mAh

3.Battery type: Lithium Polymer
4.Compatible with:any mobile phones and devices that uses USB charger: PSP, ipod, HTC, Nokia, Blackberry (You will have to use your own USB cables. Only USB cables for models stated above are included)
5.Lightweight and stylish charger that powers your mobile device when conventional wall outlet is not available. You can charge your phone right inside your purse, or pocket, while you walk around the mall, walk at park, have a tea time with friends, or anywhere. Just make sure your Hello Kitty charger is full, and you can take it along with you anywhere without worrying about running our of battery anymore