Is it ok to disconnect battery when not using for 3 months
Last 2 year when back from down south car completely dead new battery last
year this one recharged
Ok to disconnect battery before going away?
Yes, to avoid parasitic drain, as some computers and air-bag systems will have~ have to reset your clock, perhaps the pre-set stations as well~ these new tin-antimony alloy ones will last only about 5 years~ they do not take a charge up anymore, after that~
Yes it is OK but your car will need a certain amount of reprogramming when you reconnect the battery which may entail a trip to your Subaru dealer.