I leave it on but turned it offline when I am not using. I like it on 24/7 but hate the trouble to plug it in, I think keeping it offline will stretch the battery life between charges. There is a chance of damaging open files when plugs insert AND removal, sort of like crossing a street being running over by a 18 wheeler. And of course, I only charge it when battery is low. Y? Memory effect of the NiCd battery, I am afraid there is some in any rechargeble battery. And of course, I like my mother earth , keep the environment green by not wasting energy.

bun