Mark:
In my endless research of batteries over the years most articles say ALL batteries must be replaced at the same time or the old one’s will fail shortly. I have also read various articles stating that replacing all theory is an old wives tale brought on by battery manufacturers to sell more batteries.
As most know I run private yachts for a living. In my professional life I deal with large banks of batteries. The yachts themself have multiple banks of batteries for main engines, generators, electronics, & house batteries. The tenders have batteries for each outboard engine (up to 4), generator, bow thruster, house and electronics not to mention the batteries in the toys I.E. jet skis, golf carts, etc.
Various times I have been in remote locations where purchasing a complete set of batteries is impossible and get one or two is difficult, so I have replaced the problem battery only with the intention of replacing the rest in a few months when returning back to home port. As life goes, other things happen/take priority and the other batteries never get replaced.
Over the years (40 of them) I have never had a catastrophic failure of the remaining batteries, and for the most part have gotten the remaining life (2-4 years ) out of the original batteries. These successful experiments have been with someone else batteries/money. Hopefully Murphy’s Law doesn’t come in play with my own batteries. LOL
Chuck
Chuck & Katrina
2000 Featherlite
H3-45 Double slide
2014 Jeep Grand Cherokee Diesel
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