inputs.text: good extra power - actually first external battery tried since iphone 4 days android phone user first experience external battery iphone4 quite underwhelming say least 1200mah capacity charge old iphone 4 0 60 capacity phone sitting idle means short hours 10 hours oversea flight entertainment mobile device cruciali pleasantly surprised newtrent external battery ports options easily charges htc one x zero 100 charge twice including phone usage betweenone key feature liked little button external battery external battery not start charging automatically device plugged press button start charging certainly prevented external battery draining fasti also like port options offered external battery pretty much covers port options need mobile devices 7000mah capacity certainly come handy oversea business trips