[MattAu]

Originally Posted by rmorin1249

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.

I don't think that is true. At least not according to the manual. It clearly distinguish the charging stages from the maintain stages. It also tells you how long it takes to charge from empty.

https://cdn.shopify.com/s/files/1/01...al-v2.pdf?1219

[MattAu]

Originally Posted by TurtleBoy

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.

interesting, looks like the only operational info that isn't in the MyBMW App is the battery-related info. The remaining fuel amount, windows/doors,etc status, the tire pressures, etc are all in the App.

[swainbmw]

Originally Posted by rmorin1249

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.

Absolutely it is a tender not a true charger bought it to maintain the battery life because I don’t drive it for months at a time just wanted to maintain the battery before it got into a discharge state to keep from replacing battery no starting problems

[jad03060]

The battery is like a 105AHr battery. It is not uncommon for a BMW to only have the battery at maybe 70% or so, so 35AHr to fill it up…a common maintainer is in their order of 4A, so it could take nearly a day to get it full if anything is going on. Plus, if the 48VDC battery is low, it won’t get charged without a charger >20A according to the documentation.,

[swainbmw]

Originally Posted by TurtleBoy

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.

Here is my report looks good on battery

[Marty in NY]

Originally Posted by swainbmw

Here is my report looks good on battery

That looks just like mine and my car shows no signs of battery issues. While I don't pretend to know how the battery is tested for the Car Data Report, I assume it comes from the Battery Mgmt circuitry. I put mine on the CTEK every once in a while when not driving it for long periods of time and it goes from 3 to 7 in about a day or two. Then I remove it. I've never had issues starting the car or any battery related messages except for when it's on the CTEK.