•Is your battery more than three years old?
•Has your battery outlived its warranty period?
•Have any warning lights come on?
•Has your vehicle been jump-started lately?
•Have you had to use a portable charger to recharge your battery lately?
•Do the lights dim when the A/C or heat is on?
•Has your vehicle had alternator or belt problems recently?
•Is there visible corrosion on the battery posts or cables?