Now that the cold weather is creeping up on us I thought this might be worth a mention.
I kept the first Ni-Mh battery of my Giant Suede on the bike in the garden shed except when charging. In winter the temperature would have been below zero at times. That battery was down to 50% of its original range after 15 months and by 18 months it was pretty well finished. I brought the second, identical, battery into the house whenever it was not in use. That battery is now two years old and the range has reduced by less than 10% from when it was new. The only other difference was that I conditioned it when new as advised by flecc.
I know there may be other factors involved, such as pure luck with the battery cells, but on the face of it seems that avoiding extremes of cold might help battery life.
I kept the first Ni-Mh battery of my Giant Suede on the bike in the garden shed except when charging. In winter the temperature would have been below zero at times. That battery was down to 50% of its original range after 15 months and by 18 months it was pretty well finished. I brought the second, identical, battery into the house whenever it was not in use. That battery is now two years old and the range has reduced by less than 10% from when it was new. The only other difference was that I conditioned it when new as advised by flecc.
I know there may be other factors involved, such as pure luck with the battery cells, but on the face of it seems that avoiding extremes of cold might help battery life.