War Hearing Aid "B" Batteries This 33 volt "B" battery was produced during the Second World War (1939-1945) for use in hearing aids. This battery measured 3" by 2" by 1 3/8". It weighed 6˝ oz. |  | Click picture for larger view | | | | | | |
| The reverse side of this battery states, "This battery is produced in accordance with War Production Board orders and is designed to be suitable for use with any make of hearing aid device which requires for its operation a battery of this voltage and which is equipped with suitable connectors."
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| Another 33 volt war "B" battery. This one measured 3 7/8" by 1˝" by 1 3/8". It weighed 6 oz. |  | Click picture for larger view | | | |
| This war battery has the same inscription on the back as the other battery (above). |  | Click picture for larger view | | | |
| The two war batteries side by side to show their relative differences in size.
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