“When Should You Change Your Avalanche Transceiver Batteries?”
[The first thing you should do is consult the user manual of your avalanche beacon (you can find them online) and read at what battery percentage your beacon company recommends the batteries to be changed.]
This is a question that comes up again and again and there are different answers to this question. We’re going to share with you some of the industry standards that we know of and why they are what they are. The best idea is to be conservative, only use alkaline batteries, change your batteries frequently, and don’t let you batteries get below 60%.
Q: When Should You Change Your Avalanche Transceiver Batteries?
A: “At Mammut, they recommend changing your batteries at 40% (remaining battery power) with alkaline batteries. This percentage should be from your avalanche beacon outside and in the cold. One problem people encounter is checking their battery power inside where it’s warm and then they go outside and the battery percentages drop dramatically. We recommend that you have enough battery power to be able to send for 20 hours at +10C (the approximate temp against your body) and then search for 1 hour at -10C (a cold outdoor temp) and the cut-off for this is at 40% battery power in our beacons.” – Mammut employee
A: “I change my batteries anytime I notice them below 70%.” – mountain guide
A: “I change my batteries anytime I see them below 90%.” – recreational skier
Q: What Are the Basic Avalanche Transceiver Battery Life Requirements?
A: “The standard avalanche transceiver battery test (as specified in EN 300-718) requires that the transceiver is left in transmit mode for 200 hours at 10C (50F) and it should then be able to receive a signal for at least one hour at -10C (14F).” – beaconreviews.com
Q: What Are The Best Batteries To Use With An Avalanche Transceiver?
A: Use Alkaline batteries only. Lithium batteries are difficult for avalanche receivers to read and they will be inaccurate in displaying the percentage of battery charge remaining. Lithium batteries often hold a consistent charge for a long time, then suddenly drop to nearly 0%.
A: Never use rechargeable batteries. Period.