To prolong the battery life it is recommended to store it at 32 degrees at 40 percent charge. Lithium batteries only lasts a few years due to aging whether used or not so I want to prolong it as long as possible.
This website gives a chart on the capacity loss when storing lithium batteries at different temps and different charges.
http://batteryuniversity.com/learn/a...ased_batteries
The best case scenario is storage at freezing at 40 percent charge resulting in a 2 percent capacity loss in 1 year.
Worst case real world scenario is storage at 104 degrees with 100 percent charge results in a 35 percent capacity loss in 1 year.
If the freezer is too cold is the refrigerator ok? I will keep it wrapped in an air tight zip lock to prevent moisture. I do this for all my rechargeable batteries but since the kindle battery can't be removed I don't know if it is ok to store the entire device in the freezer/fridge.