I think it's been mentioned that pumps do carry on after their life time days on their timers, If so if this true? And how much longer for as people use them for back up ? Do they just take the battery out to stop it or do they have a alternative back up power chip that keeps them counting down till their completely depleted? As when I first got funding it was a case with 2 pumps, 2 yr life on each. Also it's a beautiful early morning out there !