03-vw-passat-2-8-parasitic-draw, vw b5: battery draw / drain? wet carpet? thomas exovcds. loading... unsubscribe from thomas exovcds? cancel unsubscribe. working... subscribe subscribed unsubscribe 56.8k.. Sounds like you might have what's called a parasitic draw on your battery. parasitic draw is an electrical component staying on after you turn the car off (that isn't supposed to be staying on) and draining the battery over night., well, its back. i thought after changing the battery last month for the 3rd time that my problem would go way but thats not the case. i'm convinced i have a parasitic drain. my suspicions are from the trunk light area as the previous owner had tapped into the wiring and installed led strobe lights. i have already ripped them out and taped the connections with electrical tape.