100% Brand New 3200mAh Black External Backup Battery Charger Case for Samsung Galaxy S4 * To charge the phone, simply slide the phone into the portable battery and slide ON-OFF switch to on * A perfect emergency backup when the internal battery of your device is drained on the go * No need to take off the case when connecting the phone to computer * With a leather cover, better protect for your Galaxy S4, power saving function when close the leather cover