Georgia heat kills batteries, not cold
Winter is when a weak battery finally fails, but summer heat is what killed it. Sustained high under-bonnet temperatures accelerate the internal corrosion that ends a battery's life. Most batteries here last somewhere between three and five years.
How we tell battery from starter from alternator
We load test the battery, measure charging output at the alternator, and check for voltage drop in the starter circuit. Each test isolates a different component. That is a short job and it stops you buying a battery when the alternator was the problem.