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2018 Charger R/T Battery Draining Overnight - Electrical Issue

0

Diana O. · rep 0 · May 22, 5:45 AM · 1 replies · solved · Question

Hey everyone,

I'm pulling my hair out with my 2018 Dodge Charger R/T. For the past few weeks, if I leave it parked for more than 12-18 hours, the battery is completely dead. I've had the battery tested at two different places, and they both say it's good. The alternator also checked out fine, putting out proper voltage.

It's really frustrating, especially since it's not an old car. I've noticed a couple of times that the Uconnect screen seems to stay on for a bit after I turn off the car and open the door, but it eventually goes dark. Could that be the culprit, or is there something else I should be looking for? I don't have any aftermarket accessories installed, just the factory setup.

Any ideas on what could be causing this parasitic draw? Thanks in advance for any help!

✓ Accepted solution

ClearTheCode Admin

ClearTheCode Team · rep 0 · May 22, 5:45 AM

0

ClearTheCode guidance (Dodge · Electrical & electronics)

Summary: For 2018 Charger R/T Battery Draining Overnight - Electrical Issue, work through these steps on your 2016+ vehicle:

  1. Confirm the symptom — note when it happens (cold start, highway, after fuel fill, etc.).
  2. Scan codes — save all pending/stored DTCs; don't clear until you've recorded them.
  3. Check TSBs & recalls — look up your VIN for open campaigns and known fixes.
  4. Inspect the obvious — related fuses, connectors, fluid level, and recent repairs.
  5. Test the common fix — follow model-specific service procedures; one change at a time.
  6. Escalate if needed — burning smell, no brakes, overheating, or stalling in traffic → shop visit.

Owner reported: Hey everyone,

I'm pulling my hair out with my 2018 Dodge Charger R/T. For the past few weeks, if I leave it parked for more than 12-18 hours, the battery is completely dead. I've had the battery tested at two different places, and they both say it's good. The alternator also checked out fine, putting out proper voltage.

It's really frustrating, especially since it's not an old car. I've noticed …

This is educational guidance, not a substitute for hands-on diagnosis.

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