A real powerhouse

The Anker® 2nd Gen Astro Pro2 20000mAh is ideal for those who do not want to give up access to their technical crew also for extended periods outdoors.
Who uses apps or GPS, which force the battery normally quickly to his knees, will be delighted by this power bank.
The weight of 508 grams is specified in the rucksack easy to stow - not afraid of Transport: The Power Bank comes with a shock-proof bag.
Not only the technical details have convinced me to buy - The device is also a high quality finish.
One of the given star sweeps the device by visible - like the battery indicator - and invisible technology a:
The 2nd Gen Astro Pro2 detects connected devices and depending on the manufacturer selects automatically the right to be delivered energy performance of - All connected consumers are charged as soon as possible of this powerhouse.
Declared by the manufacturer Energy efficiency is another bonus: Even if all (ie 4) ports of the external batteries are used, this is only slightly warmer - The energy comes up where it is needed.
The listed with 4-6h charging is for the power contained in the battery more than 'ok' - 20000mAh rich for 6-8 full load operations of a smartphone (depending on the manufacturer). Finally you have the Astro Pro2 much less frequently than the charge terminals.
The Power Bank turns off after a full charge automatically - no energy loss, no additional surcharge on utility bills.

The only minor penalties, deserves no deduction in the form of _ganzen_ stars in my opinion, but (because of the clear overriding plus points): Lead by ear drops when loading the device to a high-frequency buzzing noise when about 95% of the maximum battery state is reached. The sound is so high that not everyone can hear him - but I myself can not leave for charging on the bedside device.
However, I have no comparison device and this may not universal chalk.

Ultimately, the included manual is in several languages, easily understood and explained step by step, included - in this also is not recommended energy consumers to have connected to the battery while it is in the charging process. This is one of the most valuable tips to an even longer lifetime to ensure this power package.

I would recommend the device in any case!