The Power Cube is enough for about 2 full loads, I would say, at least for my Samsung Galaxy.
But not only for my phone, the device proved to be very helpful, but also for my camcorder, as well as my digicam.
I often go with my camcorder, movies quite a lot and, of course, always has to pay attention to as the battery, so I do not run out of juice prematurely so obliquely that also just like to listen.
I just close my camcorder when he slumbers in the camera bag that I threw over his shoulder, to the MiPow and leave the camcorder battery to come back some juice.
I for one am in any case quite enthusiastic about the small part.
Einzigst something Charging the MiPow which lasts about eight hours, I feel too long as a tick.