Avalanche Transceivers (beacons) and Batteries
Battery Entrenchment Quandry
Batteries have been a contentious issue in regards to avalanche transceivers over the years. One reason is the reliability of their performance and metrics is variable. So, those who use transceivers must carry extra batteries once they approach around 60% of their life cycle. Why? Because if you have to perform a search you’ll need the juice to be able to get you through finding anyone who’s buried and also be able to get you back home in SEND mode.
Lithium and rechargeable batteries can present problems because transceivers might have trouble with the currents and voltages. As well, there can be poor functionality in cold. It spawns other problems that the technology simply hasn’t been able to account for yet. However, some transceiver models will now accept lithium batteries but you’ll have to set the programming up for it. Some transceivers have built in rechargeable batteries. It doesn’t help when you’re on a long extended tour, or if you accidentally left it on overnight in your cold backpack and need to recharge it. Perhaps there’s no way to do so.
Most recently, a recall took place when it was identifies that when a transceiver was hit hard enough, like if a skier took a fall, the terminals lost contact with the battery. This shuts the software completely off and exposes the skier since not only are they not in SEND. This problem is not isolated to a single manufacturer or model. But it’s not problem of the manufacturer of the avalanche transceiver, it’s more of a battery problem.
Size Matters?
Fact is, that not all batteries are equal, not in potential energy stored, and longevity, or size of the casing regardless of the regulations they fall under (ANSI, ISO, etc…). The length of a AAA battery should be 44.5mm, but variations in manufacturing happens and so batteries length can vary within a specified tolerance for retail sale. Off brand batteries can be the biggest culprit causing problems with avalanche transceivers. These batteries can cause havoc. Why then are we still hearing about it in 2025? Shall we wait until we have to exhume one of our friends of family from the cold debris zone when prevention seems the better course of valor? It’s not that simple.
Random Sample






Here, I got up from writing this blurb and grabbed 3 batteries completely at random from my stock. A scale from the kitchen and a micrometer from the shop and I can easily demonstrate the small but significant variability. My PhD isn’t in battery chemistry or design, but It’s pretty easy to see that the above is true and that there is some fluctuation in size and weight. how much variation is significant? Well, a recall isn’t cheap and they wouldn’t do it for no reason other than protecting you against unforeseen circumstances. Avalanche transceiver manufacturers aren’t responsible for the variations of batteries on the open market. Some modifications to transceivers will now accept a more broad range of battery sizes. But this isn’t the only problems with batteries, and definitely not the only problem with off-brand batteries.
Actions
Managing your batteries and your transceiver is imperative to survival if the needs arrises. Keep your case dry and free of corrosion. Open the case daily and let the transceiver breathe. Don’t leave batteries in for long extended periods of time as they can leak and corrode the terminals.
Some solutions are available but may simply be pricy. Until then, contact a guide who knows how what to look for and give you some direction, take an avalanche rescue course, or do some diligence on your own to learn more about batteries and avalanche transceiver compatibility.
Be Safe,
James Marc Beverly