Powermax USA Quick Charge Powerpack 2800mAh Lipstick-Sized Portable External Battery Charger for Smartphones, Cameras, Games, Tablets and More, Silver Compact, portable and lightweight battery measures 3.75" x 1" x 1" Adds 8+ hours of talk time to your smartphone. Pre-charged and ready to use. Surge protection makes the Powerpack safe for all devices. Cable and carrying case included.