This calculator will help you to determine
- How long battery can power a given load that is Battery life or Battery run time
- Rate of discharge of the battery in terms of "C"
- Recommended discharge rate based on the type of battery 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 |