INOX in new Jimny Lead-Acid Battery (JIS). It works!

What is making you think the battery is getting beyond it's service life? It is a new car and even a new model of that car, its not really likely that they have found an old battery in the corner of an outbuilding and thought it will do. Most factory batteries are good for 5 or 6 years minimum service even with limited mileage.

It still works after 18 months! A recent test gave a Specific Gravity of 1282-1285, a bench Resting Voltage of 12.76V, and a Cold Cranking Amps test of over 500CCA!

I thought I had a recalcitrant alternator but it turned out to be a crook wire/connection at the computer end of the LIN circuit. This was confirmed by the Suzuki Roadside Assist-RAC Battery Technician three weeks back, and yes, correctly diagnosed by Martin about this time last year!

As for the car, it has now been called home, more details when I know.

Our new Jimny is hardly getting any use at the moment, it sits in the garage for days and then does the occasional journey.
l've never worried about the battery, it's always started up with no issues and shows no signs of becoming depleted.

l used to worry about the battery going flat in my Triumph Herald back in 1982, but that only had a dynamo which didn't charge at all when the engine was at low RPM

GeorgeC wrote: Yes, It still works after 18 months!
A recent test showed a Specific Gravity of 1282-1285, a bench Resting Voltage of 12.76V, and a Cold Cranking Amps test of over 500CCA!

www.inoxmx.com/products/mx2-battery-conditioner/

A battery conditioner will extend the life of a battery if the vehicle is not being used.
l've got one on my motorcycle, as it doesn't move all winter.
But if the vehicle is in use even if it's not every day it shouldn't be necessary.