I've got oodles of Craftsman 19.2v batteries laying around, but what does Craftsman do? Discontinue their hand vac. Lammeeee.
I tried a $5 oldschool Dirt Devil from a thrift store. It did not suck. Literally, it was trash.
I need a hand vac. I don't need no fancy nuclear reactor fusion vortex thang. I just want one with a properly sucky motor and a battery that don't go kaput every other day. Hell I'd be ok with dragging around a cord if a hand vac will suck pennies off a hardwood floor.
This guy appears to keep up to date with reviews of various handvacs and he likes GTech (Bissel).