In article ,
"Stormin Mormon" wrote:

I recently had a battery corrode in my black
4D cell Mag light. Old style bulb, if that's
relevant.

The 4D mag light by my front door was dead. I
managed to get the tail cap off (two big pipe
wrenches) and find the bottom battery had
corroded. Brand new battery, Endurance, from
Advance Auto Parts. After considerable scrubbing
and sanding, the light works again. I'm leaving it
in peices over night to dry. Then load up with
four Rayovac cells, and a shot of grease on the
tail cap threads.

The 4D mag is my "grab and go" light, in case I
need to go some where in a hurry.

It was only happy coincidence that I found the
corroded battery. Might have been there for
years, if I'd not needed the light for a bulb
test.

Since that time, others have told me that
batteries
corrode only in D cell mags, and typically the
battery next to the tail cap. Has anyone else
had this happen? Is it a common problem?

Been there done that! The only batteries in the a, c,d series that I
will use are Duracells. Had too many problems with others, especially
the bunny brand.

Chuck P.