The eneloops AA batteries in the new, black version with significantly higher capacity (2450 instead of 1900 mAh) are really excellent. The higher capacity is clearly noticeable. The only downer: Apparently Panasonic bought the thing from Sanyo. Since Panasonic an extremely poor producers / providers (which understand the obsolescence well) and I have done so far extremely bad experiences with this Japan-company, I hope that the people at least the non-Panasonic eneloops batteries still in the Dutt will ride. But I do not think so. :(