What Causes Parasitic Battery Drain. It could be a bad battery or more likely a bad battery. A parasitic battery drain is just something that consistently and continually drains your battery.

Answer 1 of 5. Top Tips to prevent mystery battery drain in your car truck or crossover. It could be a bad battery or more likely a bad battery.
The batteries are contending with a parasitic drain which happens when an electrical component continues to draw power from the battery even after the vehicle is turned offEven a slight draw can empty the battery.
Why the Accord and CR-V Batteries Keep Dying. There is always electrical power being drained from the battery. When you turn your vehicle off current generated by the car battery continues to be drawn and is used to power a range of electronics and accessories. What can cause a parasitic drain on a automotive battery.
