Keva Samsung Note III, External Power Case with Battery 2900mah and Leather Cover and Window S-view (BLACK) Specifically Designed for Samsung Galaxy Note 3 Built-in Battery Backup gives you an extra 2900mAh High-quality built-in battery; high efficiency of power conversion S View Sleep/wake Battery Flip Leather Cover Smart Casehigh Quality Portable... With overcharge/ discharge/ over-current/ short circuit protection