Question : I UNDERSTAND that
maintenance-free batteries have a shorter lifespan than conventional ones.
If this is true, what is the known shortfall in lifespan ?
How about some articles to explain the markings on batteries ? They are even
more cryptic than the markings on tyres.
I would not generalize and say that maintenance-free batteries have a shorter
lifespan but somehow even in my experience, this seems to be true.
Maybe it is because there is no means to refill them that there is a higher
volume of electrolyte but honestly I am not too sure.
Having said that, the life of a battery depends very much on how much it is
"cycled" and the more charge and discharge cycles it goes through, the faster it
will wear out.
The point I am trying to make is that you should make sure that your
alternator can handle the total electrical load of the car and the battery is
then less stressed and will last longer.
The markings on the batteries are quite straightforward with the month and
year of manufacture but sometimes the shops put in their own codes which only
they can understand.