It may be a useful product, but ...

The battery makes a good visual impression, well made and well lying in his hand. A familiar with the manual instructed me: The battery should be turned off a few seconds after disconnecting the connection to the consumer by itself and should be switched on via push button.
I observed the following behavior:. The battery either on not off, or it will turn itself after connecting a consumer a (I can not check my means), that is, when I connect a cell phone, it will be loaded immediately without that I have to press the ON button. This turns on when you press it for longer, but the battery (and charging) from. The friendly support you told me first: This is a bug, so I am sending back. Then, assured me that it was a feature. If it is so, then it is at least none that would be documented in the operating instructions. Now you might think what you want. Interesting in this context seems to me that a battery from another vendor showing the same illogical behavior (again, something else documented). It offers me to upgrade for free to a slightly more expensive part. Lo and behold. Here exactly what is in the instructions, that is, switching on a button, just off automatically (not manually possible) happens.
I suspect such behavior is not noticed by many users. However, I want to be sure that the battery is empty and does not drip in the background when I two weeks time will not need it - but now everything seems good.