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      12-17-2020, 08:20 PM   #1
pmcmtnbkr
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bimmerlink and battery %

Okay so long story short I have been using Bimmerlink to monitor oil temp boost pressure battery voltage ect. I noticed a few months ago that it also had a battery charge % under the battery icon along with being able to register the battery. Has anyone else regularly checked charge%. I havent had any battery problems and it regularly shows anywhere from 90% to low 60% charge. I can start the car check the voltage have a reading of 65% do nothing to the car get in it a few hours after parking it and have a reading of 85%. There seems to be no rime or reason to the odd charge % reading I can go from a temp controlled building 50 deg showing 60% charge drive the car to work about 8 miles check the charge and it might show 65% park the car in 25 deg temp all day get in it and have a charge% in the high 80s. I thought this could be a neat tool to get an Idea of when to replace the battery, but appears to be no better than licking a 9 volt battery to see if it has a charge. Has anyone played with this I sent an email to Bimmerlink and never got a response. As near as I can tell this is the original battery to the car and is going on 6 years old.
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      12-19-2020, 11:52 AM   #2
MarcoZandrini
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I highly recommend you replace the battery if it could be, in any way, the original battery. Batteries, as you know, don't like cold weather. Cold temps slow down the batteries chemical reactions. Try Autozone or Walmart. Then get it registered.
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      12-21-2020, 03:15 PM   #3
pmcmtnbkr
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Quote:
Originally Posted by MarcoZandrini View Post
I highly recommend you replace the battery if it could be, in any way, the original battery. Batteries, as you know, don't like cold weather. Cold temps slow down the batteries chemical reactions. Try Autozone or Walmart. Then get it registered.
Thats just it it has no indication of issues no slow cranking in extreme cold voltage is just fine, starts right up even after prolonged radio use without the car running. No random low voltage issues all the things that would happen when a battery is on its last legs. It just Bimmerlink showing odd charge % readings it makes no sense. I am not in the habit of just replacing things that don't need to be
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      12-21-2020, 09:27 PM   #4
damianbmw12
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Quote:
Originally Posted by pmcmtnbkr View Post
Quote:
Originally Posted by MarcoZandrini View Post
I highly recommend you replace the battery if it could be, in any way, the original battery. Batteries, as you know, don't like cold weather. Cold temps slow down the batteries chemical reactions. Try Autozone or Walmart. Then get it registered.
Thats just it it has no indication of issues no slow cranking in extreme cold voltage is just fine, starts right up even after prolonged radio use without the car running. No random low voltage issues all the things that would happen when a battery is on its last legs. It just Bimmerlink showing odd charge % readings it makes no sense. I am not in the habit of just replacing things that don't need to be
Quote:
Originally Posted by pmcmtnbkr View Post
Quote:
Originally Posted by MarcoZandrini View Post
I highly recommend you replace the battery if it could be, in any way, the original battery. Batteries, as you know, don't like cold weather. Cold temps slow down the batteries chemical reactions. Try Autozone or Walmart. Then get it registered.
Thats just it it has no indication of issues no slow cranking in extreme cold voltage is just fine, starts right up even after prolonged radio use without the car running. No random low voltage issues all the things that would happen when a battery is on its last legs. It just Bimmerlink showing odd charge % readings it makes no sense. I am not in the habit of just replacing things that don't need to be
6 years it needs to replaced. Bimmerlink has great support. You might want to check in with them.
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      12-25-2020, 01:46 PM   #5
lateapex'er
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Funny you ask, I had the same results when checking my battery life. My battery was 6 years old and still showed 77%. I ended up replacing it anyway due to its age and registered via the BimmerLink app. At first, it read 99% then after sitting showed 93%. Oddly enough after going for a drive it never went back to 99% but hovers around 97/96%. I figured this was normal and never paid attention to it again.

I hear you on not replacing parts if they work fine. I replaced mine this past summer, due to its age and with winter approaching I'd rather not be stranded. Was able to get my local dealer to price match an out-of-state dealer with the lowest price.

Last edited by lateapex'er; 01-02-2021 at 10:55 AM..
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      05-04-2021, 09:04 AM   #6
Dominash
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This is something normal that your car shows different battery charge parameters. The car consumes the energy while it is with the engine off, and when your engine is on, the generator starts to charge the battery. The fact that the parameters change so fast is another problem. This means that your battery is in a bad condition, and you need to buy a new one or try to recondition it. You can find some methods on batterytools.net. Reconditioned batteries works as well as newly bought batteries, maybe a little bit worse, but it helps to save some money.

Last edited by Dominash; 05-08-2021 at 09:57 AM..
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