strange sudden battery discharge

[undymm]

About 2 months ago I found my Stinger completely dead on the way from the ambulance in the afternoon. It is 2019, original battery, 70000KM, ISG off. I only have Racechip GTS and Mykeypremium remote start installed. The remote start has the function of automatically locking the car after approx. 5 meters away. The strange thing about this battery drain is that it had to drain in the time it takes me to slam the door and take the few steps before the car locks and - the mirrors fold down. I found the car completely discharged, unlocked and the mirrors were not folded down /as they are in a locked car/. I started the car via the cables, left it on the charger overnight at home and it has been working without problems since then. I disabled the auto-lock feature

 

[oddball]

It's most likely that the battery is just weak. There's so many gizmos that the car will appear dead, whereas simpler cars everything still works, it would just crank slowly.
Check the charge of the battery and/or have it tested. Batteries don't last forever. Mine lasted 3 years which is average in the Texas heat - for a battery located in the engine bay! The Stinger's is in the trunk, so it should have lasted another couple of years, but oh well.

 

[undymm]

Po celonočnom nabíjaní som ho dal otestovať, má 87%. Auto odvtedy funguje bez problémov a podozrievam funkciu automatického uzamknutia z Mykeypremium. Pretože auto sa malo po zatvorení dverí a vzdialení sa od auta samo uzamknúť. Ale nestihli ani sklopiť zrkadlá, ani auto nebolo zamknuté. Takze podla mna zlyhalo nieco so zamykanim, nejaky skrat a tym sa vybila baterka - za cca 2 hodiny.
Pri pokuse naštartovať sa prístrojová doska rozsvietila veľmi slabo, štartér už ani necvakol.

 

[oddball]

¯\_(ツ)_/¯

 

[JSolo]

No spreche kein Deutsch por favor.

 

[D.J.]

Po celonočnom nabíjaní som ho dal otestovať, má 87%. Auto odvtedy funguje bez problémov a podozrievam funkciu automatického uzamknutia z Mykeypremium. Pretože auto sa malo po zatvorení dverí a vzdialení sa od auta samo uzamknúť. Ale nestihli ani sklopiť zrkadlá, ani auto nebolo zamknuté. Takze podla mna zlyhalo nieco so zamykanim, nejaky skrat a tym sa vybila baterka - za cca 2 hodiny.
Pri pokuse naštartovať sa prístrojová doska rozsvietila veľmi slabo, štartér už ani necvakol.

Google translated.

After charging all night, I had it tested, it has 87%. The car has been working since then with no problems and I suspect the auto-lock feature from Mykeypremium. Because the car should have locked itself after closing the door and moving away from the car. But they didn't even have time to lower the mirrors, nor was the car locked. So, in my opinion, something with the locking failed, some kind of short circuit and the battery died in about 2 hours. When trying to start, the dashboard lit up very dimly, the starter didn't even click anymore

87% what? Depth of discharge? Amount of CCA's vs new? Reserve capacity?

The mykeyprrmium can NOT put such a load on the battery that it drains in 2 hrs.

Your battery when new, had ~90aH of capacity.

Your now worn battery certainly has less than that, but to discharge a large AGM battery in only 2 hours - would be a SIGNIFICANT load.





As a reference.
Here are some actual current loads on my Stinger with the engine off.
45 amps, with nearly everything on.

 

[undymm]

Sorry, I sent it translated, something must have gone wrong...

87% was measured as the remaining battery capacity, I was told that is still fine. It is clear to me that draining an AGM battery in 2 hours would have to be a very large drain. That's why I don't understand what happened, that it ran out so quickly that car didn't even have time to lock and lower the mirrors.

 

[D.J.]

Sorry, I sent it translated, something must have gone wrong...

87% was measured as the remaining battery capacity, I was told that is still fine. It is clear to me that draining an AGM battery in 2 hours would have to be a very large drain. That's why I don't understand what happened, that it ran out so quickly that car didn't even have time to lock and lower the mirrors.

Something is wrong with your observations.

What was your method to detect it was dead? was it solely that it worked the following day after charging? (coincidence)
Something else happened.
do you own a multimeter?

 

[undymm]

So one more time. I'm a doctor, I use different devices, and yes, I have a multimeter and I know what it's for

I have about 6-10mA of power consumption after sleep.

The story once more:

At 1.00 p.m. I arrived at the ambulance, after closing the door Mykeypremium should have locked and the mirrors should have folded down. At 15.00 I arrive at the car and I am surprised that the mirrors are unfolded and the car is not locked. After getting into the car and pressing the start button, nothing happened, the instrument panel did not light up, the overhead light did not light up. Of course, it was not possible to lock using the remote control or the button on the door. The electric suitcase did not work. After using the jumper cables the car started, everything was reset. I left it on the charger at home from 4:00 p.m. to 7:00 a.m. and went to the battery service center, where they measured it and said it was OK.
That's why I'm still wondering what happened to drain so quickly that he didn't even have the strength to lock the car and roll down the mirrors. And since then /about 2 months/ it has been working without problems, even the ISG, which is very sensitive to the battery. The only thing I did was disable Mykeypremium auto-lock.

 

[D.J.]

So one more time. I'm a doctor, I use different devices, and yes, I have a multimeter and I know what it's for

I have about 6-10mA of power consumption after sleep.

The story once more:

At 1.00 p.m. I arrived at the ambulance, after closing the door Mykeypremium should have locked and the mirrors should have folded down. At 15.00 I arrive at the car and I am surprised that the mirrors are unfolded and the car is not locked. After getting into the car and pressing the start button, nothing happened, the instrument panel did not light up, the overhead light did not light up. Of course, it was not possible to lock using the remote control or the button on the door. The electric suitcase did not work. After using the jumper cables the car started, everything was reset. I left it on the charger at home from 4:00 p.m. to 7:00 a.m. and went to the battery service center, where they measured it and said it was OK.
That's why I'm still wondering what happened to drain so quickly that he didn't even have the strength to lock the car and roll down the mirrors. And since then /about 2 months/ it has been working without problems, even the ISG, which is very sensitive to the battery. The only thing I did was disable Mykeypremium auto-lock.

Where did you use the jumper cables? under the hood? or directly to the battery?

What current/power is the charger that you used for 15 hours?

 

[undymm]

I used the cables under the hood, the trunk could not be opened - it is electric. The charger has 8A

 

[D.J.]

I used the cables under the hood, the trunk could not be opened - it is electric. The charger has 8A

Well, it's a mystery. Doesn't add up..

 

[Thomby]

I would take the battery out of the car, fully charge it, confirm it settles to 12.6-12.65 volts a few minutes after you take it off the charge (surface voltage will be higher but come right down), then check again after a day or so (in case you have a bad cell that's only taking a surface charge, or discharging).

Put it back in the car, make sure it's locked so it goes to "sleep", let it sit overnight and measure again. This should narrow down whether it's a battery problem or a phantom drain problem.

 

[matus]

Hello, I have the same problem. Did you manage to solve it?