I did a search and couldn't really find an answer to this.

Someone told me that to preserve the overall lifetime of my battery that I should occassionally (once a week) disconnect it from the electric and let it run all the way down to about 5%. They said that this would help to keep the cells in the battery from one by one "dying" completely.

I figured someone here would be able to tell me if this is true and why. Is it like muscles? Use 'em or lose 'em?!

Thanks