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      11-05-2019, 11:30 AM   #23
SD ///M4
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Originally Posted by Bimmer Pleaser View Post
can anyone tell me why a new M4 battery costs about $2k? Even with installation and coding it sounds asinine.
That's because you don't know anything about it. It's a "smart" Lithium iron phosphate battery (LiFePo), not your dad's auto battery. The last I knew, it was unique to the F8x M3/M4. Do some research. There's a BMW technical document on the battery here on Bimmerpost.

Also, to anyone who had to buy a new battery because your old battery got drained apparently you didn't try the reconditioning process with the CTEK Lithium US battery charger. It is possible to jump the battery to get the car started but then you need to drive the car for at least an hour to get the battery charged enough.

For more info, here's two additional posts from my thread. The first one has some information from the F80/F82 Complete Vehicle Technical Training/Production Information document: https://f80.bimmerpost.com/forums/sh...5&postcount=26

This one has the text from the CTEK user manual that explains how to bypass the under voltage protection (UVP) on the LiFePo battery: https://f80.bimmerpost.com/forums/sh...3&postcount=29
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      11-05-2019, 12:34 PM   #24
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Quote:
Originally Posted by Bimmer Pleaser View Post
can anyone tell me why a new M4 battery costs about $2k? Even with installation and coding it sounds asinine.
Because they have an Intel i9 ExtremEdition, 64Gb of DDR4 ram inside to calculate on how to make themselves more expensive than what they already are.

Seriously, they are LithiumIon. They do this for safety incase of accidents, and weight saving. But that is pain in the rear to deal with. These battery is supposed to last from 7-10 years. They have their own protection build in and pretty advanced (check ISTA for more info) so I dont know how we have bad batteries from cars that only few years old.
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      11-05-2019, 12:43 PM   #25
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Quote:
Originally Posted by SD ///M4 View Post

Also, to anyone who had to buy a new battery because your old battery got drained apparently you didn't try the reconditioning process with the CTEK Lithium US battery charger. It is possible to jump the battery to get the car started but then you need to drive the car for at least an hour to get the battery charged enough.
Agreed. People should try to tshoot it first. If you think the dealer says it is bad then it's must be because they are the dealer. lol.. You're giving too much credits to dealers.
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      11-05-2019, 01:26 PM   #26
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Originally Posted by TrauCon View Post
Quote:
Originally Posted by Bimmer Pleaser View Post
can anyone tell me why a new M4 battery costs about $2k? Even with installation and coding it sounds asinine.
Because they have an Intel i9 ExtremEdition, 64Gb of DDR4 ram inside to calculate on how to make themselves more expensive than what they already are.

Seriously, they are LithiumIon. They do this for safety incase of accidents, and weight saving. But that is pain in the rear to deal with. These battery is supposed to last from 7-10 years. They have their own protection build in and pretty advanced (check ISTA for more info) so I dont know how we have bad batteries from cars that only few years old.
NOT Lithium Ion, Lithium Iron Phosphate. Do some research.
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      11-05-2019, 02:34 PM   #27
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Quote:
Originally Posted by SD ///M4 View Post
NOT Lithium Ion, Lithium Iron Phosphate. Do some research.
Yes sir. I will do deeper research next time.
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      11-05-2019, 02:43 PM   #28
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Quote:
Originally Posted by TrauCon View Post
Quote:
Originally Posted by SD ///M4 View Post
NOT Lithium Ion, Lithium Iron Phosphate. Do some research.
Yes sir. I will do deeper research next time.
Jeez quit pissing people off around here 🙄
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      11-05-2019, 05:57 PM   #29
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Just a WAG on my part but I think the high cost is related to the fact they're not readily available now or are scarce and hard to get. also I was told it could even be up to 3 weeks. I did get a loaner 330i for no cost, lol........
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      11-05-2019, 06:44 PM   #30
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Quote:
Originally Posted by SD ///M4 View Post
That's because you don't know anything about it. ...]
I suspect their issue is that the price is expensive even for a known expensive battery. A quick Google search brings up results that are 400 and even up to 1000 less than that $1900 price on an OEM 69Ah BMW LiFePo battery...
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      11-15-2019, 03:10 AM   #31
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Quote:
Originally Posted by Tangent View Post
Quote:
Originally Posted by SD ///M4 View Post
That's because you don't know anything about it. ...]
I suspect their issue is that the price is expensive even for a known expensive battery. A quick Google search brings up results that are 400 and even up to 1000 less than that $1900 price on an OEM 69Ah BMW LiFePo battery...
Lithium ion batteries, while lighter weight, do not hold the charge (AH) of a lead or AGM battery.

So the 69AH battery is obviously less than the 92AH AGM batteries in the F30s.

As a result of the lower AH (Amp Hours), your Dashcam/Radar Detector/Alarm System etc will discharge your battery a lot faster than a AGM or lead battery.

I looked at putting a lithium ion in my F30, but decided against spending 6x more than an AGM that has less AH that would kill the battery much faster.


Quote:
Originally Posted by SD ///M4 View Post
NOT Lithium Ion, Lithium Iron Phosphate. Do some research.
Lithium Iron Phosphate is simply a form of a Lithium Ion battery.

Call it what you like, but RealOEM and virtually every BMW Dealership as well as BMW Parts Supplier lists BMW Part Number 61218047221 as a 69AH Lithium Ion Battery in their Database.
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      12-30-2021, 05:45 PM   #32
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First of all hope, OP got the battery issues fixed by now.

As I was going through this thread, wanted to get some direction to ensure that I don't mess up anything in my new 2020 F83 vert.

I am planning to mount a V1 G2 radar detector using mirror tapping wire from Belmount. Should I be concerned? Can it drain the battery if the car sits for a long time?

I see a lot of people using the MT wiring to power their gadgets but I'm sure it makes a difference if it is a daily driver vs a weekend toy.

Appreciate any help! I am very new to BMW world.
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      01-01-2022, 03:44 PM   #33
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Quote:
Originally Posted by 2Slo_F83 View Post
First of all hope, OP got the battery issues fixed by now.

As I was going through this thread, wanted to get some direction to ensure that I don't mess up anything in my new 2020 F83 vert.

I am planning to mount a V1 G2 radar detector using mirror tapping wire from Belmount. Should I be concerned? Can it drain the battery if the car sits for a long time?

I see a lot of people using the MT wiring to power their gadgets but I'm sure it makes a difference if it is a daily driver vs a weekend toy.

Appreciate any help! I am very new to BMW world.
I have my escort radar detector and camera powered by the mirror tap. Utilize CTEK lithium trickle charger when you aren’t driving for a few or more days and you will never have this issue and your battery will probably last a few extra years!
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