BSWHW Slim Rechargeable Power Bank 3500mAh External Battery Charger Powered Backup Pack for iphone 6 Built-in Portective 4.7inch Case (Black) 1.Extra Battery Charging Station, 3500mAh Standard Battery.*Cables are NOT included* 2.This powerful battery case can more than double the usage time on your iPhone 6. 3.Ultra Slim External Power Source for your Apple iPhone 6 (4.7 inches) 2014 Release 4.Swap your low battery for a fully charged one to get your phone 5.External battery charger charges and carries a spare battery for on the go use when your phone is running low on battery life