SYR 4800mAh Galaxy Charger Case,External Ultra-thin Power Bank Case Pack Back Battery Charge for Galaxy Note 4 N9100,Black Material:ABS+PC Track battery power status at a glance with an integrated 4-light LED status indicator Integrated power switch allows you to put the External Battery Case in standby model The galaxy note 4 Battery Case offers complete protection from top to bottom,Ergonomic, form-fitting, fully protective impact-resistant case-and-battery in-one for Samsung Note 4 If have any problem or dont work,contact us firstly please,we can slove your problem best