Battery Life Calculator

This calculator will help you to determine

  • How long a battery can power a given load or in other words what is the Battery life or Battery run time.
  • Rate of discharge of the battery in terms of “C” (capacity)
  • Recommended discharge rate based on the type of battery chemistry for optimum battery performance
 

Formulas:

Maximum duration a battery can power a load Battery life = Battery capacity ( mAh or Ah ) / Load current ( mA or A ) Rate at which load draws current from the battery Rate of discharge C = Load current ( mA or A ) / Battery capacity ( mAh or Ah ) Recommended rate of discharge for common battery types
Battery types Recommended discharge rate
NiCd 1C
NiMh 0.5C
Li-ion 1C
Li-ion polymer 1C
Lead Acid 0.2C
 
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