Yubi Power&reg; YP250ABLK 2500mAh Ultra Compact Lipstick Size Portable Power Bank Backup External Battery Charger for iPhone 5 4S 4 3GS, iPod Stylish, mini, and light-weight design; Fits easily into any bag or pocket; Compact "Lipstick" Size Capacity; Add 8 hours of talk time or one full charge to your iPhone 4 / 4S / 3G / 3GS; Add 80+ hours of audio playback or a full charge to the battery life of most mobile phone. Grade A cell ensures high quality; LED indicator with two colors shows the current battery state