I've had 2 times where my battery died, nether time did alarms go off. On both occasions the battery died very suddenly without warning. Since then I use a maintainer when it is stored over winter in an unheated garage and also during the driving season if the car is sitting for more than a few days.
Here in Winnipeg with the potential of 40 below anytime in Jan or Feb keeping the battery on a tender is a must if you hope to have a viable battery come spring. I've never removed the battery to store it.
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