Battery Life Calculator

Calculate accurate battery runtime and discharge time

Battery Life Calculator

Professional Battery Runtime Analysis

Results:

Runtime (Hours): 0.00

Runtime (Days): 0.00

Power Consumption (W): 0.00

Energy Consumed (Wh): 0.00

Battery Capacity Calculator
Battery Charging Time Calculator

How to Use the Calculator

Basic Calculation

  1. Enter battery capacity in Amp-hours (Ah)
  2. Input the load current in Amps
  3. Specify battery voltage
  4. Set discharge efficiency (typically 80%)
  5. Enter cutoff voltage if known

Understanding Results

  1. Runtime shows how long battery will last
  2. Power consumption indicates load power
  3. Energy consumed shows total Wh used
  4. Results account for discharge efficiency
  5. Cutoff voltage affects actual runtime

Optimization Tips

  1. Higher capacity = longer runtime
  2. Lower load current = extended life
  3. Temperature affects battery performance
  4. Deep discharge reduces battery life
  5. Regular maintenance improves efficiency

Battery Life Fundamentals

Battery Capacity

Battery capacity determines runtime:

  • Measured in Amp-hours (Ah)
  • Higher Ah = longer runtime
  • Temperature affects capacity

Discharge Rate

  • Higher current = faster discharge
  • Peukert's law affects capacity
  • Efficiency varies with load

Key Formulas:

Basic Runtime: Hours = (Capacity × Efficiency) / Load Current

Power Consumption: Watts = Voltage × Current

Energy: Wh = Watts × Hours

Calculation Formulas

Runtime (Hours):
Hours = (Capacity × Efficiency) / Load Current

Power Consumption:
Watts = Voltage × Current

Energy Consumed:
Wh = Watts × Runtime Hours

Example Calculation

12V Battery System:

Capacity: 100Ah

Load Current: 5A

Efficiency: 80%

Runtime = (100 × 0.8) / 5 = 16 hours

Power = 12V × 5A = 60W

Energy = 60W × 16h = 960Wh

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