Battery Life Calculator

Estimate battery runtime from capacity and current consumption with efficiency factor

Battery Presets

CR2032 (225mAh)AAA (Alkaline) (1200mAh)AA (Alkaline) (2850mAh)9V Battery (565mAh)18650 Li-ion (3000mAh)LiPo 1S 1000mAh (1000mAh)LiPo 2S 2200mAh (2200mAh)Lead Acid 12V 7Ah (7000mAh)

Simple CalculationDuty Cycling

Battery Information

Capacity (mAh)

Voltage (V)

Efficiency Factor (0-1)

Typical: 0.7 (70%)

Current Draw

Average Current Draw (mA)

Runtime = (Capacity × Efficiency) / Current

Results

Estimated Runtime

1d 4h

28.0 hours

Effective Capacity

1400 mAh

Energy

7.40 Wh

Days

1.2