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2. Button cell - Wikipedia

   en.wikipedia.org/wiki/Button_cell

   Button, coin, or watch cells. 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. Lithium metal battery - Wikipedia

   en.wikipedia.org/wiki/Lithium_metal_battery

   Lithium metal batteries are primary batteries that have metallic lithium ... A CR2025 is the same 20 mm diameter but 2.5 mm thick. ... on coin cells (lithium button ...

4. List of battery sizes - Wikipedia

   en.wikipedia.org/wiki/List_of_battery_sizes

   Coin cells of various diameters and thicknesses. Coin-shaped cells are thin compared to their diameter. Polarity is usually stamped on the metal casing. The IEC prefix "CR" denotes lithium manganese dioxide chemistry. Since LiMnO 2 cells produce 3 volts there are no widely available alternative chemistries for a lithium coin battery. The "BR ...

5. Battery nomenclature - Wikipedia

   en.wikipedia.org/wiki/Battery_nomenclature

   Round button batteries also carry two-digit size codes such as R44, see the button battery table for typical dimensions. Other round, flat, and square sizes have been standardized but are used mostly for components of multi-cell batteries. Assorted sizes of button and coin cells, including alkaline and silver oxide chemistries. Four rectangular ...

6. Renata (battery) - Wikipedia

   en.wikipedia.org/wiki/Renata_(battery)

   Renata was founded in 1952 by Kurt Zehntner, as a manufacturer of components for mechanical watches and diversified into production of coin or button cells in 1974. Renata was acquired by SMH Swiss Corporation for Microelectronics and Watchmaking Industries Ltd in 1982 (in 1998, SMH became known as The Swatch Group) [1] and produces cells, batteries and associated encapsulation technologies ...

7. 3 Rare Nickels Worth Big Money in 2025 - AOL

   www.aol.com/3-rare-nickels-worth-big-110133203.html

   The specimen in question was graded PR66 (proof 66) with all other known specimens coming in at PR64 or below, according to the Professional Coin Grading Service (PCGS). The PR64 specimen sold via ...