mAh (milliampere-hour) is a unit used to measure the capacity of a battery. It tells us how much current a battery can supply in an hour. The higher the mAh rating, the longer the battery will last. In this article, we will discuss how to calculate the mAh rating of a battery.
What is the formula for mAh rating?
The formula for mAh rating is:
mAh = (Current x Time) / 1000
Where Current is the amount of current drawn by the device in milliamps, and Time is the duration of use in hours.
How do I calculate my battery capacity?
To calculate the capacity of your battery, you need to know its mAh rating and voltage. The formula for battery capacity is:
Capacity = mAh x Voltage / 1000
For example, if you have a battery with a mAh rating of 3000 and a voltage of 3.7V, its capacity would be:
Capacity = 3000 x 3.7 / 1000 = 11.1 Wh
How long does 5000mAh battery last?
The duration of a battery depends on the amount of current drawn by the device. However, we can estimate the duration of a 5000mAh battery by dividing its capacity by the current drawn by the device. For example, if a device draws 500mA of current, a 5000mAh battery would last:
Time = Capacity / Current = 5000 / 500 = 10 hours
What is the mAh of standard batteries?
The mAh rating of standard batteries varies depending on the type of battery. Here are the mAh ratings of some common batteries:
- AA alkaline battery: 2000-3000mAh
- AAA alkaline battery: 1000-1200mAh
- CR2032 lithium coin cell battery: 220mAh
- 9V alkaline battery: 500-600mAh
In conclusion, calculating the mAh rating and capacity of a battery is essential to determine how long it can power a device. By using the formulas and examples provided in this article, you can easily calculate the mAh rating and capacity of your battery. Remember that the mAh rating is not the only factor that determines the performance of a battery, factors such as temperature, age, and usage patterns can also affect its performance.