I can recommend the battery very EasyAcc. He feels quality workmanship at, nothing creaks or cracks. In terms of size it fits into every (male) Pocket, also along with the phone. But who has smaller pockets can also use the supplied lanyard and battery hanging around his neck - he is so light you can hardly feel it.
But enough of the externals, we come to the essential characteristics: the battery is charged to 100 with an ordinary Micro USB cable to the power supply within about 2 hours of completely 0. The cable is supplied, the power supply, but I would claim that almost every smartphone user has a. The charging time is ever to very positive.
The iPhone 5 is also fully charged in about 2 hours from 0 to 100! This shows that the charging current of 2.1A probably true, effective batteries can not do this so quickly, by the way not the USB port on my computer. Therefore, absolute buy recommendation. After being fully charged the battery still lights up when a LED, an estimated 15-20% of battery charge remain so desired.
Unfortunately I can not give full 5 stars, actually a half-point deduction I have to give for the built-in flashlight. For me personally anyway a useless feature, but everyone likes assessed differently. When the battery but as I carried in your pocket, it can happen that the light switch is pressed accidentally, without you noticing it. If you're lucky the falls a glowing pocket even if not likely to valuable electricity, which was meant for the phone use, partly of course.