I have found that a #393 watch battery is the same size as a #13 hearing battery. In the old days the regular wattage for a hearing battery was also 1.5 watt. Now the standard hearing battery lowered to 1.4 watt. The #393 tremendously helps me with one of my hearing aids. Eveready and Duracell still continues to be the top two competitors in the battery business.Get more detail about Energizer 393 Button Cell Battery.
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