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2. Button cell - Wikipedia

   en.wikipedia.org/wiki/Button_cell

   A button cell, watch battery, or coin battery is a small battery made of a single electrochemical cell and shaped as a squat cylinder typically 5 to 25 mm (0.197 to 0.984 in) in diameter and 1 to 6 mm (0.039 to 0.236 in) high – resembling a button.

3. Silver oxide battery - Wikipedia

   en.wikipedia.org/wiki/Silver_oxide_battery

   These button cells generally follow the same compact design. The bottom portion of the cell is the cathode, which consists of a graphite infused silver oxide. A plastic membrane separates this from an anode of powdered zinc dissolved in an alkaline electrolyte. An insulating gasket keeps the two contacts apart, facilitating the discharge of the ...

4. Primary battery - Wikipedia

   en.wikipedia.org/wiki/Primary_battery

   A variety of standard sizes of primary cells. From left: 4.5V multicell battery, D, C, AA, AAA, AAAA, A23, 9V multicell battery, (top) LR44, (bottom) CR2032 A primary battery or primary cell is a battery (a galvanic cell) that is designed to be used once and discarded, and it is not rechargeable unlike a secondary cell (rechargeable battery).

5. Talk:Button cell - Wikipedia

   en.wikipedia.org/wiki/Talk:Button_cell

   Moved to "Button cell" rather than "Watch battery" because this battery is used elsewhere other than watch. Kboom 13:55, 12 July 2007 (UTC) But "watch battery" is the official term used in the relevant international standard (IEC 86-3) and is clearly more descriptive. Reverting move. Markus Kuhn 17:26, 26 July 2007 (UTC)

6. LR44 - Wikipedia

   en.wikipedia.org/?title=LR44&redirect=no

   This page was last edited on 3 April 2017, at 22:00 (UTC).; Text is available under the Creative Commons Attribution-ShareAlike 4.0 License; additional terms may ...

7. Mercury battery - Wikipedia

   en.wikipedia.org/wiki/Mercury_battery

   A mercury battery (also called mercuric oxide battery, mercury cell, button cell, or Ruben-Mallory [1]) is a non-rechargeable electrochemical battery, a primary cell. Mercury batteries use a reaction between mercuric oxide and zinc electrodes in an alkaline electrolyte.