"Geoffrey S. Mendelson" wrote in message
...
Cato wrote:


When I carried a gas mask, I carried with it a small pocket radio with
a speaker that used two AAA batteries. Better than nothing and if you
only listen for a few minutes at a time, will last for days.


In an uncertain situation I would avoid wasting power/energy of any sort.

USE headphones whenever possible. Uses less energy and you will not emit
any audio to passerby's which will attract attention. DO NOT BRING
ATTENTION TO YOURSELF!