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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

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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

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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