This charger has allowed me to sort through the multitude of batteries that I had, thinking for certain that they were still good .... I do surprise me anymore, why my devices were extinguished after a few hours. The load can be fast (discouraged) or long depending on the setting, there is an indication of the actual capacity of the battery charge termination and if he is very tired regeneration can be attempted (sometimes effective). a really good device that may seem a bit expensive compared to what we found but it has nothing to do with a charger to 15 euros!