Mt first TT I sold after 10 years, with 10 year old Trojan T125s 6volt golf cart batteries and they are still going strong on their 14th birthday. Our new to us TT now 4 years old with us is going strong with 2 T-125's. The longevity is all about not discharging below 50%. I use a Trimetric Battery meter and whether on solar, or generator, thats my guide and its mounted in plain sight. We dry camp as much as FHU so its important. Last I checked the water levels and keep distilled water with us all the time. I expect this set to be sold with the TT in a few years and will do that same thing again on our next rig. Best bang fo rthe buck when you amortize it over 10 years imho.
