Lipstick Sized Design, Put in yur pocket,clutch bag or purse handbag ealiely as a mini emergency portable battery charger. -3300mAh is big enough to add almost 1.2 charge (6 hours talk time) to an iPhone 7, or about 0.8 charge to a iPhone 7 plus. -Built in lightning cable connector, just plug & charge, never bother with lightning charging cable again. -Power bank lightning input: Designed as iphone battery charger, not like regular power bank that is micro-USB input. -Pass-Through Technology: Charge your iphone while charging the power bank.