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Comparing a design reporting every second with one reporting every minute, the battery life is longer by a factor of roughly

  • A.sixty, if the radio dominates the budget
  • B.sixty, whatever else the design consumes
  • C.two, the sleep current being unchanged
  • D.one, the reporting interval not affecting the life

Answer: A

Only the term that dominates scales the answer: where the radio is almost the whole budget the improvement approaches the ratio of the intervals, and where sleep current dominates it is much smaller. Knowing which term dominates is the point of building the budget.

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