How long should my battery last?

This article explains what the average battery lifespan is and factors that affect it whether in service or storage.

Batteries typically last between 3 and 5 years, depending on a number of factors:

  • Daily depth of discharge
  • Installation location
  • Discharge rate
  • Ambient temperature
  • Charging ability (e.g. solar panel shading)
  • Storage time without charge

Batteries will self-discharge at a rate of around 2–3% per month, depending on temperature, when in storage. Batteries have a usable shelf life of around 9 months at room temperature before they need to be recharged.