Unfortunately, bad buy - There are from Sanyo / Panasonic Chargers better!

The supplied AAA batteries are beyond reproach, but you should, as already mentioned here
strongly advise against this charger. I had there too late ensured.
There is min. Two problems with this charger:
- Charging current is very small => long charging time
- Even worse: No charge termination by dV / dt detection, which in modern NiMH batteries as
the eneloops and even with older batteries quasi inevitably in an overload and thus permanent damage to the batteries
ends.
Timer-charge 16h inevitably leads to overload in AA and AAA.
Taking the battery by, for example 10h itself from the device, they are either already overweight or not completely full, or by chance precisely fully ... This is actually total nonsense.

Better alternatives: SANYO eneloop quick charger MQR06 e-4-3UTGB and Panasonic BQ-CC16