[Elecraft] Yamaha CM500 bias batteries durability

[Ron D'Eau Claire]

If all they do is provide bias to the electret mic element, they will last
many years  - the "shelf life" of the battery. The amount of current they
must supply is miniscule. 

Ron AC7AC

-----Original Message-----
hello,

how long a pair of AAA batteries will last in the bias of the CM500?  Will
be enough for a 48 hours operation in the contest?

I need to use the small black box with the 2 x AAA batteries to connect the
CM500 in the DXDoubler.

73,
Jorge
CX6VM/CW5W