I picked up the 2 pak of 4aH batteries before Christmas for 99 bucks.
Things I notice, the plastic is different, they dont fit the tools tight- wiggle around
and in general look much "cheaper". The good, I been using one on my drill and 8"strikemaster auger
and they hold up well. I drilled 30+ 8" holes the other day in 12" of ice and it still showed 3/4 of a full charge left.
So, they seem to OK stuff!