The best place to store your batteries is right where you store your hearing aid(s) at night; in a bedside table, or if you have space, in a drawer in your bathroom. That way the batteries will be there when you put your hearing aids in first thing in the morning.
We suggest keeping the batteries out of reach of small children (and dogs!) that could mistake the batteries for candy. And no, it is not a good idea to keep your batteries in the refrigerator. Condensation and moisture can harm them. Avoid extremes in temperatures too, when possible. Hearing aid batteries like room temperature!