Has anyone else observed this problem?

I keep my AA's in an unheated garage. Here in northern CA it has become seasonably stormy (i.e. humid and around 55 degrees) or clear and cold (i.e. 25 degrees as low).

Well my garage kept AAs stopped working. One is a stock bipe with 5 flights on it. The other is a balsa and tissue slow fly project, where the only electric mod is to extend the motor wires. Both B channels. The charger batteries test to 1.5 volts. Both fully charged.

So has anyone else had problems with long term storage in unheated spaces?

KL