A few answers to the fundamental questions and a highly recommended battery bank with many advantages

With the stated capacity of 6,000 mAh can be a newer Smartphone approximately 2 to 2.5 times completely recharge. Older phones with less power can certainly invite more frequently. For tablets of all kinds, including the iPad, the performance is only sufficient for a partial charge.

Which devices can be loaded?
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The list is long: smartphones of all manufacturers (Apple, Samsung, Lumia, Huawei, etc.), mobile phones, tablets (limited), Bluetooth speakers, Bluetooth headset, MP3 player, etc.

Delivery
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Battery bank, USB charging cable, German-speaking guide.

How is the device used?
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At the front end there is a USB port. With any USB charging cable to be loaded a device is connected to it. Once the two devices are connected, the charging process will start automatically. As a rule, the Power Bank therefore need not be specially still turned on. To turn on or off the torch light, the Power button is pressed twice in quick succession.

Charging indicator
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During charging, the remaining battery capacity is always shown by the battery bank. There are 4 LED lights installed, which always reveal whether sufficient power is present or whether the battery bank itself will be loaded soon.

Processing
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The build quality is quite high for a still relatively cheap device. I have decided, for example, for a colorful model, in which the surface has a nice. Everything is as I expected. The decent packaging could convince. So this device is also a beautiful gift.

Features & Benefits:
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1) Compared to many other battery packs made here an advantage: It will automatically detect the connected device and adjusts to the proper input current. All units are charged quickly and gently.

2) While the battery bank itself depends on the network and is charged, it can still charge a connected device. Some other batteries can only one of these parameters, not both together.

3) This battery of RavPower is for its stated capacity of 6,000 mAh quite small and mainly easy! I've tested devices with the same power that had larger and heavier.

4) Plug & Play: Has not every battery bank! Means that the battery will automatically start when a device is tuned. Even better: The battery switches off automatically as soon as the device to be charged is full.

5) Built-in flashlight. Bright enough to recognize power in the dark room everything, but should not be confused as a powerful bright flashlight!

Longevity
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An external battery can provide approximately 500 charging cycles normally. This battery is one of the latest models and the manufacturer promises twice the number of charge cycles, so it creates up to 1000 charging cycles!

Conclusion
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If you want a really great device with many advantages, should definitely buy this one of RavPower. There are already some cheaper models with the same power, but convincing here processing, design, benefits the other devices do not have and a great German instructions. I have the device for a few weeks in use and am happy.