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Coin Cells and Peak Current Draw

Authored on: Sep 30, 2010 by Mathias Jensen

Technical Paper

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Designers of portable equipment using coin cell batteries are challenged by system level energy budget considerations, mainly driven by MCU and RF current consumption, as well as by the capacity and specification limits battery manufacturers provide. This paper shows that adding a capacitor in parallel with a CR2032 coin cell is the most effective choice a designer can make to maximize battery capacity utilization in low power RF applications (more than 40% improvement with poor quality CR2032s).

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