I found this information on the internet that could relate to the cold weather 
and the Sony mini disc problem. It is only a shot in the dark, but I have a 
feeling that this may very well be the case. What I do know is that cold 
weather will affect cassette recorders causing them to slow down when in the 
record mode. Some of the Sony models had a pitch control to compensate for this 
problem when the audio being recorded in the field had to be transferred to a 
computer or another audio source. I had a portable minidisc recorder, 
microphones, a video camera, and a digital camera that all use AA batteries. 
Before I left, I got the maximum capacity rechargeable AA cells I could find 
and brought lots of spares just in case. I should have been able to run my 
minidisk recorder for 3 or more hours with a fully charged set but it always 
seemed to run out on me. 

Extremely cold temperatures impair the performance of batteries because 
chemical reactions work slower at lower temperatures. Batteries make or store 
electricity using chemical reactions. Before my trip I anticipated that cold 
weather could give me battery trouble. I bought a battery pack for my camera 
that attaches to the camera with a cable so I could keep the batteries warm 
under my coat. But the temperatures I experienced were never below freezing, 
and were not cold enough to cause problems. The battery problems I did 
experience were probably caused by a few bad batteries. My minidisc recorder 
takes 8 AA batteries and if a single one of the them malfunctions, the machine 
won't work. 

So I did occasionally run out before I wanted to, even with all my spares. One 
day I was on a long trip and I had to shuffle all the batteries several times, 
even removing cells from my microphones to get the last bit of juice out to 
take some pictures.





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