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2. 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 ...

3. 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 ...

4. 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.

5. Battery nomenclature - Wikipedia

   en.wikipedia.org/wiki/Battery_nomenclature

   Lithium-ion batteries have a different rule for naming, which applies both to batteries of multiple cells and single cell. They will be designated as: [13] N 1 A 1 A 2 A 3 N 2 /N 3 /N 4-N 5. where N 1 denotes number of series connected cells and N 5 denotes number of parallel connected cells (only when the number is greater than 1); these ...

6. AA battery - Wikipedia

   en.wikipedia.org/wiki/AA_battery

   A Li-ion 1.5V AA-size battery, sold by the Chinese company Kentli as "Kentli PH5" since 2014 and with similar batteries later available from other suppliers is a AA-sized battery housing containing a rechargeable 3.7 V Li-ion cell with an internal buck converter at the positive terminal to reduce the output voltage to 1.5 V. [18] The Kentli ...

7. Eveready Battery Company - Wikipedia

   en.wikipedia.org/wiki/Eveready_Battery_Company

   The facility produced hearing aid batteries, aluminum-air batteries, C and D zinc-carbon batteries, and six-inch dry cell batteries at various times. It was closed in March 1998 following the decline in demand for zinc-carbon batteries. [38] Eveready opened a plant in Bennington, Vermont in 1942 and a facility in St. Albans in 1947.