When it's the battery
If the car starts slowly or not at all but the lights and dash work when jumped, the battery is a likely cause. Batteries also have a finite life and can fail in hot weather.
When it's the alternator
If the car starts but the battery keeps dying, the lights dim at idle, or a battery or charging warning light comes on, the alternator may not be charging the battery. A charging-system test confirms it.
We test before we replace
We test the battery and charging system to find the actual cause before recommending a battery, alternator, or starter. That way you replace the part that's actually failed.
Want us to take a look?
These articles are general guidance — not a diagnosis of your car. Bring it to Happy Cars at 12935 W Colonial Dr, Winter Garden, FL 34787 and we'll inspect before we recommend any repair.