On Tuesday, January 13, 2015 at 1:21:19 PM UTC-8, Phil Kangas wrote:
I've been handed a nice mag-lite with LED
bulb and the batteries leaked and are now
stuck in place.

Three possible solutions:
(1) find enough label on the batteries to claim flashlight replacement
from the battery manufacturer
(2) make a suitable (wood) set of vice jaws to hold the tube,
and drill out the batteries (or bore, if you have a lathe)
(3) use the LED parts to upgrade an unused filament-lamp
variant

The electrolyte in many modern batteries is alkaline, and it attacks
aluminum alloys (which is what the flashlight is made of). There
might be damage other than 'stuck batteries'.