My Xperia S has a battery of 1750 mAh that ranges normal for the whole day, silks to use the phone a little more intense, such as playing games or navigation then the phone is Ruck Zuck empty and now what if you can charge it anywhere? An external battery is needed.
The appearance and features:
To the battery itself, this makes a fairly solid impression, however, is very large and is reminiscent of a very old heavy MP3 players.
The four charging LEDs are working properly and show a the level once you pressing the button.
If you push the button two times, the battery is also a small LED in greatest need time enough to eg short in the darkness what to look for, but in no way replaces a flashlight (similar to cell phone flash LED).
Otherwise he has to even load (In) a Micro USB port like almost all modern mobile phones and a normal USB output (OUT).
The supplied cable (long and short) and all adapters have me personally not pledged as I charge the battery with my cell phone charger and the mobile phone itself with the original USB cable charging, because I find it so convenient (connect less which can solve accidentally).
What I liked a lot that the battery has to be activated (the charging cable is connected must be pressed the button again) so accidental discharge is avoided and it switches off automatically as soon as (in my case) the mobile phone to 100% is loaded.
The technique:
Now comes the big "secret" which is why you should not have too much expectation.
The 5600mAh refer to 3.7V. This tension also cell phone batteries.
Now you might think I mean that 1,750 mAh battery with the least 3x Laden could wrong.
Because of the USB output voltage to 5V must first time be increased to be later reduced again to 3.7 V in the cell phone. The transformers that are necessary for it, also need energy and just in the mobile phones usually have a poor efficiency since the current from the socket is almost infinitely available and smaller losses not notice / disturb.
This means that I can my phone battery exactly 2.1 times (almost 210%) with charge, the remaining nearly 2000mAh (1925mAh) go (in my case) for LED display and the transformers on it !!!
CONCLUSION: Who takes the much-heralded 5600mAh and these were distributed to battery size and is pleased with many Ladezirklen, will be ultimately disappointed.
But who is realistic and do not expect too much in advance has a good battery on the go the you can recommend thoroughly.
Therefore I 4 of 5 stars.
