A parasitic drain refers to when your car’s battery continues to drain even after the car’s parked, and the amount of drainage is much higher than normal. Usually, it’s a faulty accessory in the car causing the drain – for example, a sensor or interior light doesn’t switch off automatically. The accessory will keep consuming power until it’s manually switched off. Other such faulty accessories can include a damaged relay switch, computer module, alarms, headlights, boot or glovebox lights, or other electrical components.
If you think you have a parasitic drain, call the experts who can easily diagnose this by performing a parasitic current draw test.