Originally Posted by Red liner
Wow, is that enough? I've been trekking high altitude and in cold weather (not as cold as yours!), but have always been unsuccessful at having batteries retain their charge.
Many of the more power hungry cameras (like DSLRs) have an external battery pack on an extension wire as an accessory - they can either be used to extend shooting time for professionals running large or multiple flashes, or can be worn full time inside one's clothing keeping the batteries warm even when the cameras are cold.
For anyone looking to shoot in cold weather, it might be worth investigating whether one of these is available for your camera, or buying a camera with such an accessory when the time comes for new gear.
Another tip (which may not be adequate for Antarctica!) is that lithium batteries are much less affected by cold than other types.