"Frank Thompson" wrote in message
...
Black & Decker Laser Level uses three 1.5 volt batteries which are and
corroded. They won't come out. Is there any way to remove them?

If the hardware is basically toast try soaking the device in ammonia or
vinegar. This (usually) loosens the corrosion and allows the batteries to
be removed.

Afterward flush the device with water and set in the sun to dry. Be aware
that corrosion on the electronics tends to follow the 'leads' into the chips
and the devices usually fails over time. Often faster then it would
otherwise.