Power Bank with weak chest

The Mini Power Bank I have now in detail to test and keep it brief. You must definitely not the specified capacity 1: 1 to the possible charging capacity. I was in several tests the battery from my HTC M7 and M7 identical to my wife to a maximum of 75% charge (battery capacity of 2300mAh M7). To get a null value, I have also tried to charge the HTC M7 to reach 0% discharged state, without success, the charge current ranges does not seem sufficient to start the charging process (from the electrical outlet worked this easily). So it means that you are buying additional battery capacity, but must not let the smartphone completely idle.