Just replaced the reliable Panasonic red top yesterday morning after sensing a slight crank delay. As suspected, 20% life left after 6yrs & 9days of service. Not too shabby at all. Sadly, no more of same to be had as Yuasa took over. Swapped in a nippon-made house brand(Raiden) of our trusted batt source as twas the only available factory spec'd 1.. Hope this'll be as good.