I've been looking for a reliable battery-powered vacuum cleaner.
Important points:
Reliable batteries, easy to find replacements.
Versatile, able to reach corners.
Easy to clean!
The obvious: Good vacuum, efficiency

I had a Delonghi that would trap dirt inside the badly designed
internal parts. Horrible to clean.

Some that come to mind:
Black and Decker Dustbuster:
http://www.bedbathandbeyond.com/stor...eyword=vacuumh

Shark:
http://www.bedbathandbeyond.com/stor...eyword=vacuumh

Dirt Devil:
(Don't have a link on hand)

Can any of those knowledgable about these things please help to tip
the scales?