To calculate how many hours a certain

**mAh**lasts, you have two options:**Option A)**Enter the mAh and the Amps below and then click on the "Calculate hours" button:

mAh:

Amps:

Hours

The formula is (mAh)/(Amps*1000) = (Hours). For example, if you have a 3000 mAh battery that runs at 0.2 Amps (0.2Amps = 200mA), then the time that the battery will last for is (3000)/(0.2*1000) = (3000)/(200)= 15 Hours.

**Option B)**Enter the mAh, the Volts and the Watts below, and click on the button to calculate the hours:

mAh:

Volts:

Watts:

Hours

If you have voltage and watts, then the formula is (mAh*Volts)/(Watts*1000) = (Hours). For example, if you have a 3000 mAh battery that runs at 5 Volts and 15 Watts, then the time that the battery will last for is (3000*5)/(15*1000) = 1 Hours.