Personally, I couldn't wait 15hr - with eneloops anything that takes less than 2hr is doing harm to the cells - Sanyo recommend no more than 950mA charge current. I imagine most LSD cells are the same, but at least Sanyo tells you so. Some people tell you to charge them at up to 2A - but Sanyo ought to know about their own cells better than anyone else.
I have an 8A (15 minute) charger for AAs, but I prefer not to kill them that way. The cycle life of cells treated that way is minimal. The set of 2000mAh Energizers that came with it very, very occasionally get charged in it (usually in the car), but I don't normally need charged cells that fast and I do own more than 50 LSD cells which can be relied upon to work when required.
But it is a truly excellent name for a charger.