After I in a motor-driven lock function repeatedly had trouble with several, especially well-known alleged strong 9V blocks, because the tension already in the new state did not allow for function or function after a short time was no longer possible, I have since the first Energizer Lithium 9V block emptied. But that has lasted compared to all other batteries much longer. Consequently, the old battery was again replaced by this type. A better testimony there is not no doubt.
