Robert,
I have a similar setup in my IV-P and had planned to replace two of the four
batteries every two years, expecting them to last for four years…but I never
looked at the expected/advertised life; I was just following a practice used
for lead/acid batteries. Two of my batteries are coming up on two years old;
the other pair are coming up on four years, and I’d planned to replace them
during the condition inspection next month. I’d appreciate your
thoughts/experience on this.
Thanks,
Bob