A very good combination
Sanyo NiMH are probably the best rechargeable cells available, and these D cell converters are well made. The Eneloops are 2,000 mAh, and are low discharge cells. As you can see in the photo, the nipple falls inside when no cell is present, protecting it.
I'm using two of them as I write, runtime testing a two D cell light.
Reviewed by: shankus from Mojave desert.