[quote author=SCOOBYCOLM link=topic=30408.msg474198#msg474198 date=1397300458]
all depends on your alarm id say
i usually just disconnect my battery
i got fed up replacing them
[/quote][quote author=Keadeen link=topic=30408.msg474202#msg474202 date=1397301129]
Life span depends on several things:
1) what kind of battery (different technologies are better for "deep-cycles" and others better for "high-crank") e.g. Acid-Lead vs Calcium Silver
2) what quality battery (good vs cheap make)
3) temperature - e.g. a flat acid-lead battery can freeze easier and that causes damage like plates moving and touching due to ice which then means battery shorts itself and cannot hold charge.
4) age... limited life and efficiency reduces over time... actual time again dependent on 1 and 2.
5) maintenance - mainly applies to acid-lead -- don't let the acid level go down to where plates are exposed as they oxidize and that's permanent damage. Also, when filling only use demineralised water, not tap water!
Typically for all though, when storing car and not regularly using, you must either drip feed it / put permanent "intelligent" charger on, or fully disconnect battery so there is no drain. If you let it fully discharge you will significantly impact the life span no matter what battery it is (from reducing life to killing it outright).
[/quote]
cheers lads, prob stick a new one in when i'm puttin it back on the road, then decide next winter what;s the best way to go