Zenmervolt
Elite member
Those Panasonic batteries are _not_ lead-acid batteries. They were also used in the original Miata and are Absorbed Glass Mat (AGM) batteries. While they deliver the same power as a lead-acid battery, they typically last 10 or more years.Originally posted by: TechnoKid
I replaced the factory panasonic battery in my bro's 1994 honda civic last summer. That battery lasted over 10 years, it was still working fine, but I didn't want to chance it. I still have it today, has good water levels, and the plates still seem to be ok. Just needs to be charged I suppose.
Perhaps you are not only looking at a dead battery, but also something wrong in the charging system, namely the alternator.
Any more than 5 years from a lead-acid battery is exceptional.
ZV