What I find interesting is that on these 6 volt flooded battery threads its not stated how far these batteries are discharged. Yes that's how they are rated by number of full discharge cycles.So im guessing they are drawn down to almost nothing. However what I have found using Trojan T 125s is that if you hold the discharge to no greater than 50% they keep going on and on. Sold my first TT after 10 years with two Trojans T125s, still going. Bought a new to us TT 4 years ago and its a no brainer another two. We just traded up to a fiver and I added two more. So now up to 4 Trojans 125's. I know Ill get 10 plus years out of them. I use the Trimetric 2030rv meter to let me know state of charge and just upgraded to 648 watts of solar. Its a delight not to worry about it.