The device displays a few minutes after switching on, in what condition is what battery, and actually manages some batteries "revive" who produces nothing but heat in other charging devices, and afterwards still were empty.
"Desperate" cases are also identified reliably and verifiably.
Thus, the old battery collection can be easily separated in wheat and chaff.
The relatively high charging current "healthy" batteries are fully after about 4 hours.
On the other hand, may be due to loading and unloading, plus fully awaken batterierschonendem "trickle charge" many problematic batteries back to life.
Mir is the particularly noticed by a number of relatively problematic 9V block, even in the "Sondermuellkiste" that were, in principle, but now back to work reliably.
In this respect, the charger is actually already "paid for itself".
And if you do not just stuffing Saemtliche Saddle Genuine with different batteries, the device remains lukewarm.
Somehow this looks like after (hoffentich) long life.
Absolute buy recommendation.