Check the number of battery cycles your computer has gone through

Battery cycle count: A battery is not a count of how many times you have charged your computer, it’s how many times you have used all of the battery’s power.

For example, if you let your computer battery drop to 25% and charge your computer fully at night, then use the 25% in the morning, even though you still have power, this is once cycle. Your computer discharged 100% of its battery. That is to say, a battery cycle can be completed over multiple days, and is a measure of how much power has been consumed cumulatively.