my experience with different batteries
excide plates dissolved in a year literally
fk it lasted about 3.5 years but had the problem of discharging in just 2 days if car wasn't used also its electrolyte dried quite often
ags 3 years and still going strong, the 80 something amp in my 2.0d saloon(after standing unused for a week) still had enough juice to jump start an 3.4l prado(without 2.0d saloon's engine running) and it took 3 long cranks and by the sound of it i knew battery could do 3 more. also put one in my khyber last year(48 something number or amp) and my khyber gets mostly driven with less then idle rpm(when i've to grab some grocery at night, i'm sleepy, don't like the noise of the engine and shift up every 10kph, 4th gear at 35kph isn't a big deal) n head lights on but the battery doesn't give a problem in the morning. 