Medical Definition of anaphylactic. : of, relating to, affected by, or causing anaphylaxis or anaphylactic shock.
Part of the Electronics glossary: Battery life is a measure of battery performance and longevity, which can be quantified in several ways: as run time on a full charge, as estimated by a manufacturer in milliampere hours, or as the number of charge cycles until the end of useful life.
It's better to replace a watch battery before it's completely dead rather than waiting for it to expire in the watch. Most batteries have a useful life of 18 to 24 months, some can last as long as 5 years, depending on the watch and its features. Replacing a watch battery every two years is a good practice. Many modern watches also have an end-of-life indicator.