That depends on a lot of variables, the most important of which is the battery size and capacity, the load required, the number of hours of operation of the battery, the limitation of state of charge SOC.
Mounica Naramulu To calculate the battery life you need to know parameters such as battery capacity (mAh), device consumption (mA)and the consumption rate. With this, you can get the estimated hours. To calculate the runtime, you need the Ampere (Ah) and Load (W).
That depends on a lot of variables, the most important of which is the battery size and capacity, the load required, the number of hours of operation of the battery, the limitation of state of charge SOC.