harold1946 wrote:
There is not a single battery manufacturer that says it is ok to store a wet cell battery for four months without a means of maintaining full charge.
That is a statement that would be hard to dis-prove.....even if someone wanted to take the time to try.
The ONLY significant factor if not connected is the self-discharge rate. That varies by battery make and model; sometimes a LOT.
One should not BLINDLY leave wet cell batteries sitting unattended without checking on them but most will survive just fine if initially fully charged and healthy. This is especially true if the temperature is low.
For "good" wet cell batteries, any degradation over 4 months should be minimal AND likely would even be less than cycling them up and down a dozen times over that same time period.
And finally, if you have healthy AGM batteries, charge them up and then leave them alone. They will do just fine over 4 months with no special attention.