Impossible to say. A decent battery should last at least 3 years. A great battery may last 5 or more years. Remember every time you run the battery down, you are cutting it's life short. Keep the battery clean and fully charged and it will last a long time.
Keyword: watch batteryQuestion: How long does a average watch battery last? This is a very good question. The average watch battery can last at least a year or so but it all depends on the particular brand of watch you are using.
check the number on the battery a 36 month battery can last 36 months but varies on conditions and maintenance practices. if it is bad though you may get some credit for the difference between how long it is supposed to last and how long it actually did. 3 years is not bad though
it doesnt matter what type of computer you have, it depends on how long the battery in your computer lasts. there r many different types of batterys. some last a couple hours, and some last up to 6 hours.