I have 6 Land Rovers that get used infrequently (some hardly ever) all have lead acid batteries.
Five of them have secondhand batteries, when the daily driver complains on startup a new battery is fitted and the old one passes to a Land Rover.
Every few months I charge all the batteries, some of them are now 6-8 years old. All the cars start without issue.
Maybe fit an isolator to the battery so you are 100% sure there is nothing draining it and charge occasionally.
Colin
'56 Series 1 with homemade welder
'65 Series IIa Dormobile
'70 SIIa GS
'76 SIII 88" (Isuzu C240)
'81 SIII FFR
'95 Defender Tanami
'58 Series II (sold)
Motorcycles :-
Vincent Rapide, Panther M100, Norton BIG4, Electra & Navigator, Matchless G80C
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