At the base happy to find a battery that can last longer, I am now disappointed. I did not see the time savings of this battery after charging. In searching I have read on the material a posteriori that it had to load 12. But nothing was attached to the battery when it is sent to indicate this. So I probably missed the first charge and the gain that it should give me autonomy. Result my battery is not better than a conventional battery and the load is more ultra long. Missed. Someone else has succeeded and had the autonomy gain accordingly?