It is recommended that most batteries be stored at about 59 degrees and while lead-acid batteries must be kept at a full charge nickel and lithium batteries should be stored at 40% of their capacity to minimize capacity loss.

Lithium-ion batteries power the majority of today’s laptop computers. The battery compartment on many laptops rises to about 45°C (113°F) during operation. The combination of high charge level and elevated ambient temperature presents an unfavorable condition for the battery. This explains why the lifespan of many laptop batteries is so short.

Nickel-metal-hydride can be stored for about three years. The capacity drop that occurs during storage is permanent and cannot be reversed. Cool temperatures and a partial charge slows aging. Nickel-cadmium stores reasonably well.

Manufacturers recommend to trickle charge a nickel-based battery for 24 hours when new and after long storage. This will bring all cells to equal charge level and redistributes the electrolyte to remedy dry spots on the separator brought on by gravitation of the electrolyte. It is advisable to verify the capacity with a battery analyzer before use. This is especially important in critical applications.