0
Batteries lose their power when exposed to low temperature, even below 60o.
These special batteries can take low temperatures.
Lasers diodes commonly require 3-6v. Its convenient and less costly to buy 1 cell.
<--Conclusion-->
The main purpose is to save you change and they are "cold resistant" at a convenient level.
What else can I help you with?
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Norm Green was born on 1956-11-03.
