LatioR,
Your battery may be working fine with no problem cranking, but batteries have a life span of 2 yrs on average.
I am sure you do not want to be caught unaware and be faced with a flat battery when you are in rush and also have to end up paying more to call for emergency battery replacenment service.
Don't be penny wise, pound foolish.
2 years is about a good time to get a new battery as a preventive measure.
