To so relieved I am that there are now many mobile chargers on the market. Before short I found the V7 6600mAh: a simple yet futuristic design and a device that is comfortable in the hand. With the LED display you can see the battery level, which is very convenient. Charging even goes jiffy, but the best thing is that you can charge his cell phone several times.
As a great bonus I also want to mention the built-in mini flashlight that has already saved me some time in the dark, for example looking at the keys in my purse.