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2. Zinc–air battery - Wikipedia

   en.wikipedia.org/wiki/Zinc–air_battery

   Zinc–air hearing aid batteries PR70 from both sides. Left side: Anode and gasket. Right side: Cathode and inlet opening for the atmospheric oxygen. A zinc–air battery is a metal–air electrochemical cell powered by the oxidation of zinc with oxygen from the air.

3. The 9 best rechargeable hearing aids, according to hearing ...

   www.aol.com/lifestyle/best-rechargeable-hearing...

   Forget fumbling with tiny hearing aid batteries thanks to these top-rated rechargable hearing aids. ... Hearing aids have a vast range of prices, from a few hundred to a few thousand dollars ...

4. List of battery sizes - Wikipedia

   en.wikipedia.org/wiki/List_of_battery_sizes

   These are also sometimes known as B batteries, but are very distinct from actual B cell batteries. 30-volt: Eveready 413: 20F20 (Zn/MnO 2) 210: 140: 30 V (20 cells) Flat round (one each end) H: 64 L: 25 W: 15 Used in older instruments. [248] These were sometimes sold as B batteries for hearing aids and small radios. 45-volt: Eveready 415: 30F20 ...

5. Hearing aid - Wikipedia

   en.wikipedia.org/wiki/Hearing_aid

   Hearing aids are used for a variety of pathologies including sensorineural hearing loss, conductive hearing loss, and single-sided deafness. Hearing aid candidacy was traditionally determined by a Doctor of Audiology, or a certified hearing specialist, who will also fit the device based on the nature and degree of the hearing loss being treated.

6. Mercury battery - Wikipedia

   en.wikipedia.org/wiki/Mercury_battery

   After the Second World War the battery system was widely applied for small electronic devices such as cardiac pacemakers and hearing aids. Mercury oxide batteries were made in a range of sizes from miniature button cells used for hearing aids and electric wrist watches, cylindrical types used for portable electronic apparatus, rectangular ...

7. Charles M. Price Support Center - Wikipedia

   en.wikipedia.org/wiki/Charles_M._Price_Support...

   Charles M. Price Support Center was a United States Army base located in Granite City, Illinois, across the Mississippi River directly to the east of St. Louis. Originally selected as a site for a U.S. Army supply depot during World War I, it was not established until World War II as the Granite City Engineer Depot. The installation employed up ...