Well I went ahead and bought the Panasonic. I just wanted the 12 volt
but they didn't have the one with metal-hydride [sp?] batteries in stock
and the 15.6 was only $10 more so being the typical pick-up truck
driving American I am I thought "if it's only $10 more and it's heavier
and more powerful why not?"
Now I'll be able to strip out every screw in a drawer glide in moments.