Definitions for "life expectancy"
How long a given person is expected to live; useful for insurance premium calculations.
The average length of time a group of individuals of the same age will live.
estimated length of life ...... back
The lifetime of a battery after which the capacity has fallen by 20% of the original capacity. Battery life is best expressed in terms of number of cycles but the number of cycles varies dependent on the depth of discharge for most of those cycles.