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Battery Life Calculator
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Battery life is based on the current flow towards the load. It is the ratio of the battery capacity to the load current given as
Battery life = $\frac{Battery\ Capacity}{Load\ current}$ $\times$ 0.707
Here mA /hr tells that how many milli amperes of current flows through the battery in 1 hour.

The Battery life Calculator is a online tool to calculate battery life.You just have to enter the value of battery capacity and the current flowing through the load to get the battery life instantly.

## Steps for Battery Life Calculator

Step 1 :

Read the given problem and observe the given quantities.

Step 2 :

To find the battery life use the formula

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

Substitute the values in the above formula and get the answer.

## Example on Battery Life Calculator

1. ### The current of 20 mA flows through the load of battery. If the battery capacity is 15 mA. Calculate the battery life.

Step 1 :

Given: Battery Capacity = 20 mA, load current = 15 mA.

Step 2 :

The battery life is given by

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

= $\frac{20 mA/hr}{15 mA}$ $\times$ 0.707

= 0.94 hr

Hence the battery life is 0.94 hr

2. ### If the battery life is 0.5 hr. If a current of 30 mA flows in the battery calculate the battery capacity.

Step 1 :

Given: Battery life = 20 mA, load current = 30 mA.

Step 2 :

Battery Capacity is given by

Battery Capacity = $\frac{Battery\ life\ \times Load\ Current}{0.707}$

= $\frac{0.5\ hr \times 30\ mA}{0.707}$

= 21.21 mA