Stinger 3.3T 2018 battery discharge

[Matus]

Hi, I'm new to this forum and I'd like to ask for your advice. I'm from Europe so please take my English with a grain of salt .

I've owned a 2018 Stinger 3.3T for 2 years. Lately I've been having a battery drain problem.

The whole story started with the original battery in the car and one day I couldn't start it. So I figured that since the battery was original, it must be the problem and I bought the same new AGM battery which I installed.

I drove the car for about 2 days when the problem happened again. The battery was so drained that I couldn't even open the car with the key fob.

We then took the car to the service center where they found that the car had a low idle current draw and at such a high rate that it could drain the battery from night to morning.

The mechanics can't help because they've checked the electronics but can't figure out where the problem is.

I've probably read all the forums where this or a similar problem has been solved. But no one has written a solution to the problem when they solved it

Please give me any advice that will help get the stinger back on the road :-D

Thanks, group

 

[Snicklefritz]

Calling, @Ah GetFd the battery guy.

An AI search return says that it could be "... a faulty alternator with bad diodes that grounds the battery when the engine is off.

"Other critical factors include chronic undercharging, where the vehicle's alternator voltage (typically 13.5–14.2V) is insufficient to fully charge the AGM battery (which often requires 14.8V), leading to sulfation that reduces capacity and causes rapid self-discharge."