Overview

The Battery Life Calculator predicts when your car battery needs replacement based on age, driving patterns, and climate conditions. A typical lead-acid 12V battery lasts 3–5 years, but actual lifespan varies with usage.

Formula

Estimated Remaining Life (months) = Base Life (months) x Environment Factor - Months Elapsed. Example: 48-month base, city driving (factor 0.85), 24 months elapsed → 48 x 0.85 - 24 = 16.8 months remaining.

How to Use

1. 1Select the battery type (lead-acid, AGM, EFB).
2. 2Enter the battery installation or last replacement date.
3. 3Select your primary driving condition (short city trips, long highway, mixed).
4. 4Click 'Calculate' to see the estimated remaining life and recommended replacement date.

Tips

• ✔Frequent short trips don't allow the battery to fully recharge, shortening its life.
• ✔Extreme heat (above 35 C) and cold (below -10 C) significantly reduce battery performance.
• ✔Always-on dashcams and multiple electronic accessories increase battery drain.
• ✔Slow cranking or dim headlights are signs the battery needs inspection.
• ✔A shop can run a voltage test — below 12.4V indicates the need for a charge or replacement.

FAQ