inputs.text: arcadia acd66 6600 mah - pro 1a 21a outputs plus ipad auto shut feature prevent battery drain plenty power charge mutiple devices led battery meter power button prevent accident press con bit bulky carrying pocket 25\\ shorter length would ideal pocket size no ac adapter work iphone4 ac adapter micro usb mini usb phones need additional adapters nonstandard usb phones overall battery pack well solid design enough power last day long long flight trip