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# Battery Life Calculator

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Battery life calculator determines how many hours can a battery works provided the load current and the capacity of the battery. In simple words, one can say that battery life is a ratio between battery capacity and load current. The formula is given as,
Battery life = $\frac{Battery\ capacity}{Load\ current}$$\times 0.707 ## Steps Back to Top Step 1 : Read the problem, identify the given measures and put it down. Step 2 : Substitute these values into the equation and find out the battery life of a given battery. ## Problems Back to Top Let us discuss some problems related to battery life. ### Solved Examples Question 1: The load current through a battery is given as 2mA and the capacity of the battery is 3.5mAhr. Find out the life of the battery. Solution: Given parameters are, Load current = 2mA Battery capacity = 3.5mAhr Life of the battery is given as, Battery life = \frac{Battery\ capacity}{Load\ current}$$\times$ 0.707

Battery life = $\frac{3.5}{2}$$\times 0.707 Battery life = 1.23hr Question 2: The load current and life of a battery are given as 3mA and 2hr respectively. Calculate its capacity. Solution: Given parameters are, Load current = 3mA Battery life = 2hr Life of the battery is given as, Battery life = \frac{Battery\ capacity}{Load\ current}$$\times$ 0.707

Battery capacity = $\frac{Battery life \times Load current}{0.707}$

Battery capacity = $\frac{2\times3}{0.707}$ = 8.48mAhr