brand new and high quality<br />Smart Battery (Optimized to lengthen your Phone performance time; No more out of power dilemma during important phone conversations)<br />Light weight・ thin design (Low profile)<br />Non slip comfort grip<br />Automatic tests function<br />High-quality Li-polymer Cellphone battery<br />USB charging and Sync without the need to disconnect your iPhone from the case<br />ON/OFF Button for Optional Power Output Control