4200mAh Portable USB External Rechargeable Backup Battery Power Bank Charger Case with Viewing Stand for Samsung Galaxy S6 - Black Slim Body: perfect fit for Samsung Galaxy S6 edge Quality materials: imported PC material, through the international environmental certification, non-toxic, safe and reliable! Plug and Play Double Life: Built original new 4200 mA high-quality polymer batteries Quality batteries intelligent protection: batteries, with high energy density, no memory effect, high conversion rate, slow decay Supports data synchronization, support for mobile operating system version upgrade