- Keep batteries in a dry place at normal room temperature. DO NOT REFRIGERATE. This will not make them last longer. Most batteries will provide dependable long life even after five years of storage in these conditions.
- Keep battery contact surfaces and battery compartment contacts clean by rubbing them with a clean pencil eraser or a rough cloth each time you replace batteries.
- Remove batteries from a device when it is not expected to be in use for several months.
- Removed batteries from equipment while it is being powered by household (AC) current.
- Extreme temperatures reduce battery performance. Avoid putting battery-powered devices in very warm place.
Courtesy Duracell and Costco Household Almanac