If your car battery is dead, try jumpstarting it using jumper cables or a portable battery booster. Make sure the cables are properly connected—positive to positive, negative to a metal part of the car. After jumpstarting, let your car run for 20-30 minutes to recharge. Check the battery terminals for corrosion and clean them if needed. If the battery is old or jumpstarting fails, consider replacing it or calling roadside assistance for help. Regular battery checks and maintenance can prevent unexpected failures.