On Fri, 15 Aug 2014 11:24:31 -0400, wrote:

I have a fairly expensive flash light. Unfortunately it now has three
corroded AA batteies, in the "power tube". That corrosion prevents
"easy" removal / replacement.

Might one have a suggestion as to how I might remove the corroded
batteries?

I presume the batteries are swollen, prevents removal.

You might try drilling the center of the batteries, making
progressively larger holes and then try to collapse the batteries so
you can pull them out.

I'd also try a solution of water / baking soda in the tube to cut some
of the corrosion. YMMV