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Why do zinc air batteries have a tab?

April 26, 2017air batteries Tab zinc

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Why do zinc air batteries have a tab?

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Hearing aid batteries use outside air as a source of power. The tab seals the air holes on the battery, ensuring freshness when purchased. After you remove the tab, the battery takes about a minute to charge fully and to be ready for use. Do not remove the tab until you are ready to use the battery; replacing the tab will not extend the battery life.