When you first get hired to a job, the employer quotes your gross salary or gross hourly pay. But your net salary will most likely matter to you more in your day-to-day life....
Batteries are affected by temperature and or humidity. If batteries are too hot or too cold, then yes batteries will exhibit behaviors that would be incongruent with their normal and designed operating specifications.
Car batteries are rated for a number of months ranging from 24 to 60. -Cranking power of the battery (stronger ones last longer). -Climate the battery is used in (very hot and very cold climates shorten battery life).