[B767capt]

My Cetek 7002 says the snowflake is to be used for AGM batteries. Been using it for 12 years with that setting on my AGM batteries.

[swainbmw]

Only reason I’m trying to figure this out is there’s months sometimes six months at a time I don’t drive this car and I want to be able to charge the battery up to avoid battery failure . Any thoughts if it never moves off of level 3 what the problem maybe bad charger from bmw or maybe the battery topped off enough that it does not sense the need to try to charge I’ve been using battery chargers for years and have never run into this challenge. Mind you charging systems and cars have changed also chargers have changed. Comments appreciated.

[Marty in NY]

Originally Posted by swainbmw

Only reason I’m trying to figure this out is there’s months sometimes six months at a time I don’t drive this car and I want to be able to charge the battery up to avoid battery failure . Any thoughts if it never moves off of level 3 what the problem maybe bad charger from bmw or maybe the battery topped off enough that it does not sense the need to try to charge I’ve been using battery chargers for years and have never run into this challenge. Mind you charging systems and cars have changed also chargers have changed. Comments appreciated.

You already successfully used the BMW charger, right? Maybe it failed after that but you can continue testing that theory by connecting it, waiting to see what it does and if it doesn't react properly, remove it, connect your CTEK and see if that works properly. You can do that a few times which should tell you because when I contacted CTEK and asked what the diff was between the BMW charger which looks identical to the CTEK MXS 5.0, they snaked their way around the answer. My take was there was no diff except for the branding.
In any event, I bought the CTEK and have been successfully using it for the past couple of years and my car, like yours, sometimes sits for months without starting it. Once/month I connect the CTEK and let 'er rip to #7, then disconnect it. I just pulled a Car Data report and it says my battery's health status is 200, its the original 2021 battery.

[TurtleBoy]

Originally Posted by pshovest

My understanding is the 48v start is only used on restart after shutdown from ASS.

Are you saying that if I park, lock and then restart while engine temp is above 140F, the 48v system used?

That is a good question. My guess would be that the traditional starter would be used in those situations. In the following, I take "cold" start to be starting the engine at the beginning of a drive and not the engine starting during a drive.

"The first “cold” start is always handled by the traditional 12-volt pinion starter motor. But if the engine is above 60 degrees Celsius (140° F), the 48-volt system will handling starting the car. This allows for less emissions, a 20% quicker start, and less disruptive vibrations and sounds for the vehicle’s occupants."

[swainbmw]

Originally Posted by Marty in NY

You already successfully used the BMW charger, right? Maybe it failed after that but you can continue testing that theory by connecting it, waiting to see what it does and if it doesn't react properly, remove it, connect your CTEK and see if that works properly. You can do that a few times which should tell you because when I contacted CTEK and asked what the diff was between the BMW charger which looks identical to the CTEK MXS 5.0, they snaked their way around the answer. My take was there was no diff except for the branding.
In any event, I bought the CTEK and have been successfully using it for the past couple of years and my car, like yours, sometimes sits for months without starting it. Once/month I connect the CTEK and let 'er rip to #7, then disconnect it. I just pulled a Car Data report and it says my battery's health status is 200, its the original 2021 battery.

Originally bought the ctek 5.0 And was successful, but it took multiple times and not looking at it for about three days and Wasn’t sure I was happy with it so I sent it back and purchased the BMW charger to see if any difference between the two now the bmw charger won’t go past a 3

[Gilles79]

Originally Posted by swainbmw

Originally bought the ctek 5.0 And was successful, but it took multiple times and not looking at it for about three days and Wasn’t sure I was happy with it so I sent it back and purchased the BMW charger to see if any difference between the two now the bmw charger won’t go past a 3

I had the same difficulty with the CTEK 5.0 getting stuck at stage 3 on my 2022 40i xdrive. So I purchased a NOCO Genius 10 and it has worked every time.

[Marty in NY]

Originally Posted by swainbmw

Originally bought the ctek 5.0 And was successful, but it took multiple times and not looking at it for about three days and Wasn’t sure I was happy with it so I sent it back and purchased the BMW charger to see if any difference between the two now the bmw charger won’t go past a 3

Ok, I misunderstood you to have them both in your possession now. I recall when I used the CTEK to charge two deep cycle marine batteries, it stayed on 3 for a day and a half, well could have been two days but after that it progressed up the ladder to 7. I suppose each brand has its own way to measure and condition the battery so maybe just give it more time. Mine works great on my X5.

[swainbmw]

[QUOTE=Marty in NY;30934642]Ok, I misunderstood you to have them both in your possession now. I recall when I used the CTEK to charge two deep cycle marine batteries, it stayed on 3 for a day and a half, well could have been two days but after that it progressed up the ladder to 7. I suppose each brand has its own way to measure and condition the battery so maybe just give it more time. Mine works great on my X5.

That’s actually what I’m going to do. Is connect it back up and let it go at least 3 to 4 days . Then I’ll report back with discovery do you think if it comes on the iDrive about the battery warning, ⚠️ start car When that happens, Would that stop the charging process. And leaving the hood, a jarred and unlocked.

[rmorin1249]

Originally Posted by B767capt

My Cetek 7002 says the snowflake is to be used for AGM batteries. Been using it for 12 years with that setting on my AGM batteries.

That is my understanding as well.

[Marty in NY]

[QUOTE]=swainbmw;30934815]

Originally Posted by Marty in NY

Ok, I misunderstood you to have them both in your possession now. I recall when I used the CTEK to charge two deep cycle marine batteries, it stayed on 3 for a day and a half, well could have been two days but after that it progressed up the ladder to 7. I suppose each brand has its own way to measure and condition the battery so maybe just give it more time. Mine works great on my X5.

That’s actually what I’m going to do. Is connect it back up and let it go at least 3 to 4 days . Then I’ll report back with discovery do you think if it comes on the iDrive about the battery warning, ⚠️ start car When that happens, Would that stop the charging process. And leaving the hood, a jarred and unlocked.

That's a pretty standard iDrive warning message, I get it too and ignore it because I know what caused it. Prop the hood open, I place a role of paper towels to keep the hood from latching. Then attach the charger to the charging terminals and just let it charge for three days and monitor it. The car will make noises about every 10 min or so for the duration. I do not believe that warning stops the charging process, it certainly doesn't with mine.

[swainbmw]

So after 48 hours upon checking the car the charger has went from level 3 to turning it self off . . In the manual, it says after 50 hours if nothing changes you could have a bad battery.

[Marty in NY]

Originally Posted by swainbmw

So after 48 hours upon checking the car the charger has went from level 3 to turning it self off . . In the manual, it says after 50 hours if nothing changes you could have a bad battery.

Wow, never seen that with mine, it just goes to the Float stage and hangs out there. Well, since you have used two diff chargers and both have coughed up hairballs, it could be your battery. Take it to a car parts place and have them check it to see what the results are, they do it for free around me.

Did you pull a Car Data report? That might also tell you if your battery is getting close to needing replaced or needs replaced now.

[swainbmw]

Originally Posted by Marty in NY

Wow, never seen that with mine, it just goes to the Float stage and hangs out there. Well, since you have used two diff chargers and both have coughed up hairballs, it could be your battery. Take it to a car parts place and have them check it to see what the results are, they do it for free around me.

Did you pull a Car Data report? That might also tell you if your battery is getting close to needing replaced or needs replaced

Good idea on testing the battery and how do you get a car data report?

[TurtleBoy]

Originally Posted by swainbmw

Did you pull a Car Data report? That might also tell you if your battery is getting close to needing replaced or needs replaced

Good idea on testing the battery and how do you get a car data report?

Request it in MyGarage. Click on Vehicle Profile and there will be an option for CarData.

[GREENPUS]

Originally Posted by pshovest

My understanding is the 48v start is only used on restart after shutdown from ASS.

Are you saying that if I park, lock and then restart while engine temp is above 140F, the 48v system used?

I think Turtleboy already answered this. I can’t say definitely that’s how it works but it’s my understanding if you park your car at wallyworld and step in and out of wallyworld and your ICE is 140 or above, it starts engine using the 48v like it does with ASS.

[swainbmw]

I think the app is changed under vehicle profile , which I’m not even seeing that there’s no vehicle data

[TurtleBoy]

Originally Posted by swainbmw

I think the app is changed under vehicle profile , which I’m not even seeing that there’s no vehicle data

It is on the MyGarage website not the app.

[swainbmw]

Originally Posted by TurtleBoy

It is on the MyGarage website not the app.

Gotcha just requested a report

[Marty in NY]

Originally Posted by swainbmw

Gotcha just requested a report

When you get the email stating your report is available, you click the link in it and you will have to download the report to your puter, it should end up in your download folder or where ever you set your downloaded files to go. Then double click the file, I think its a zip file, then you will see a few diff looking files, one is a pdf that explains how to read the report, you can save that to your puter for reference.

The actual report will be an html link, so you will once again need to download it once you see it or just view it online but.. .. BMW will not keep it on line for long so its best to download it so you always have it to compare the next one to. It's not an intuitive process the first couple of times you do it but if you do it monthly, it becomes easier.
I'm going on memory here so what you see may differ a very slight bit. Look at my post #63 to see the battery sections of the explanatory pdf.

[MattAu]

Originally Posted by TurtleBoy

Request it in MyGarage. Click on Vehicle Profile and there will be an option for CarData.

Too bad this looks like it's for US cars owner. Even though I have an account on the US site, I can't enter my VIN. I can't find anything equivalent in the CAD site.

What else does the report show?

[TurtleBoy]

Originally Posted by MattAu

Too bad this looks like it's for US cars owner. Even though I have an account on the US site, I can't enter my VIN. I can't find anything equivalent in the CAD site.

What else does the report show?

The UK has it but not sure where it is perhaps their ConnectedDrive site.

There is a bunch of info, including the below plus info on your CBS and ConnectedDrive status.

[rmorin1249]

Originally Posted by swainbmw

So after 48 hours upon checking the car the charger has went from level 3 to turning it self off . . In the manual, it says after 50 hours if nothing changes you could have a bad battery.

The CTEKs are not chargers. They are maintainers. They may bring a battery back to full charge but they are designed to maintain a battery not charge one that is severely depleted. If your battery is so weak it won't engage the starter it would be best to put the battery in a charger.