iPod Nano battery loses charge when it's cold My fourth-gen iPod Nano has very recently started to completely lose its charge when I'm outdoors (currently it's a bit colder here, about 10°C / 50°F).

Indoors, or when it's warmer, it still manages a relatively reasonable music playback time of about 10 hrs. Is there anything I can do except contact Apple about a battery replacement? (The iPod is no longer under warranty and I want to avoid the 59 currency unit fee.)
The temperature you describe is not cold enough to affect battery functions too much. It’s within the operating temperatures and it shouldn’t happen. Take a look at the temperature charts in the Apple iPod Battery page and if it doesn’t perform as expected, contact them immediately.

UPDATE: If the iPod is not under warranty, you’re pretty much “hosed”, however, you can attempt a manual battery replacement. This google query is a good starting point.