Heat is the real enemy
Most people think cold weather kills batteries. In reality, heat does the damage — it evaporates electrolyte and speeds corrosion inside the battery. Winter just reveals the weakness.
Expected lifespan in Texas
Nationally, batteries last 4–5 years. In Texas, plan on 2–4. If yours is three years old, test it before summer.
Signs of a failing battery
Slow cranking, dim headlights at idle, a battery warning light, or a swollen case are all signs. Corrosion on the terminals also reduces performance.
How to extend battery life
Park in shade or a garage, keep terminals clean, avoid lots of short trips, and get a free battery test with every oil change.