[Laser] pointers life XE2AT

[Alvaro de Leon Romo]

Another question is if the pointer need 4.5 volts to operate what happen if 
I use less power ?
  How many hours is the life of the pointers ?
  The pointers are less effective or bright after 5 minutes continue 
operation ? ( to found each other at long path )
   The pointer produce hot or we need some break time to permit the pointer 
cool ?
   I see after a long ON time the pointer is less bright and after 5 minutes 
its bright is normal again, I am using 3 volts..
Al
Thanks in advance
Ps my pointers is chain type

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