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  The
standard avalanche transceiver battery test (contained in EN 300 718) is to leave the transceiver
in transmit mode for 200 hours at 10C (50F). It should then
be able to receive a signal for at least one hour at -10C (14F).
The transceiver comparison table displays
the manufacture's stated battery life.
Replace your batteries before they get
too low (you can use the old batteries elsewhere, such as in your CD player). Always
use fresh, high quality, alkaline batteries. All of the batteries should be replaced
at the same time using the same brand. Never use rechargeable batteries.
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The batteries
should be removed if you are not going to use the transceiver for a longer period
of time (e.g., at the end of your winter) to prevent damage due to battery leakage.
Leaking batteries will void most transceiver warranties.
Some manufactures say that there is
still enough reserve in the batteries to operate when the battery level displays
as 0%. However, I am unsure whether all manufactures say this. For
example, the
Pulse Barryvox manual says the beacon will send for at least 20 hours and
then receive for one hour when the battery indicator says 20%. That isn't much
time. Personally, I try to
replace my batteries when they drop below 50% and I never let them get below
20%.
(Read
about the recall of the Ortovox M1 and M2 dealing with the battery door.)
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