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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.
in the case of battery-powered watches, a battery end-of-life indication. The presence of an indication that the watch is running in total darkness. This is usually indicated by a running second hand with a luminous tip or tail. Magnetic resistance. This is tested by 3 expositions to a direct current magnetic field of 4 800 A/m.
A Battery: Eveready 742: 1.5 V: Metal tabs H: 101.6 L: 63.5 W: 63.5 Used to provide power to the filament of a vacuum tube. B Battery: Eveready 762-S: 45 V: Threaded posts H: 146 L: 104.8 W: 63.5 Used to supply plate voltage in vintage vacuum tube equipment. Origin of the term B+ for plate voltage power supplies.
This list is a summary of notable electric battery types composed of one or more electrochemical cells. Three lists are provided in the table. Three lists are provided in the table. The primary (non-rechargeable) and secondary (rechargeable) cell lists are lists of battery chemistry.
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In 1994, Timex acquired the Nautica Watches license and introduced Timex Data Link. The Data Link PDA-type watch could receive contact and scheduling information from a sequence in a computer monitor's light using software developed with Microsoft. [34] They introduced the Timex Expedition brand in 1997, designed for rugged outdoor sports.