Just to chuck in a thought, repeating myself, but my batteries lasted nearly nine years with a rapid decline only in the last part of this year. Bog std Numax leisure. Always been topped up with solar and a smart Sterling mains charger and a Sterling alternator booster. I did something right! Why pay more?
Stu
+1. I bought Squadron Energy AGM's in 2005/6 winter, trashed them (down to 4V) in Jan/Feb 2007 by leaving something on, and only changed them in 2015. Solar installed in 2009 as well
