inputs.text: wonderful power bank keeps going day long - originally purchased new trent icarrier 12000mah dual usb ports external battery pack could use phone gps unit bike details found liked unit much decided find another battery backup unit could use daily basis trent easypak nt70t 7000mah external battery pack fit bill perfectly surprised versatile unit built micro usb port battery easily keeps phone head phones running day long 10 hours strait train morning 8 hours work train home music gymmy complaint new trent icarrier 12000mah dual usb ports external battery pack slippery case happy see trent easypak nt70t 7000mah addressed problem back unit tacky finish keeps unit place small size trent easypak nt70t 7000mah makes perfect fitting backpack even pant pocketid recommend unit anyone daily commute uses phone heavily