In general: Very handy, suitable for any bag. The performance is sufficient for current smartphones, at least for a whole load, about 1 to 1.5 days Arrives you again so on. Overnight charging goes smoothly. The status LEDs reveal the current charge level.
In addition, the device is quite chic. If you only need a single charge when breaks down the cell phone in the evening, may like to access. For several days, such as holidays or tents, should be more to a 5000mAh - recourse Power Bank.