For Iphone 6 4.7" External Battery 3500 mAh Power Bank 4.7inch Portable With Pop-Out Kickstand (black) 3500mah power, long working time the design is beautiful, practical strong, long life cycle types of battery: lithium polymer battery Safe and reliable, suitable for use in travel and outdoor activities. 3500mAh Power Bank Portable External Battery Backup Charger Case With Pop-Out Kickstand for iPhone 6