I just assume I need to buy a new battery once a year. The life of the battery seems to decrease over time and budgeting for a new battery each year seems to w

I just assume I need to buy a new battery once a year. The life of the battery seems to decrease over time and budgeting for a new battery each year seems to work for me. I usually keep a laptop as my primary for 2 years, so it is only one additional batter per machine.