Question

If I have a battery that can supply 150 mAh at 3.0v for 10 days. The battery weighs 15 grams. How do I calculate the energy density?

Answer 1

To calculate the energy density of the battery, you can use the formula:

Energy Density (Wh/g) = (Capacity in mAh * Voltage in V * Time in hours) / Weight in grams

Let's plug in the values:

Capacity = 150 mAh
Voltage = 3.0 V
Time = 10 days = 10 days * 24 hours/day = 240 hours
Weight = 15 grams

Now, calculate the energy density:

Energy Density = (150 mAh * 3.0 V * 240 hours) / 15 grams

Energy Density = (4500 mWh) / 15 grams

Energy Density = 300 Wh/g

So, the energy density of your battery is 300 watt-hours per gram (Wh/g).