[crazyzxf]

When I was browsing the F90 M5 catalogue, I come cross this. If you have collected your M2C, can you confirm if the car came with Lithium battery as the M5 does?

I find the information useful, one of the page mentioned the 24V EPS in the previous model, the large capacity battery can eliminate the need of DCDC, a 2nd battery and therefore 90lbs weight saving sounds like a no brainer, I will be angry with BMW if they don't come std in all M models.

Thx.

[CSBM5]

The M2C does not come with an Li battery like the M3/M4 do; if it had it would drop about 30lbs of weight. It would also result in a $1500 battery at replacement time. It's not a direct swap as that link shows; plus I'm guessing the charging system would provide the wrong input cycle and voltage for an Li battery.

[crazyzxf]

Originally Posted by CSBM5

The M2C does not come with an Li battery like the M3/M4 do; if it had it would drop about 30lbs of weight. It would also result in a $1500 battery at replacement time. It's not a direct swap as that link shows; plus I'm guessing the charging system would provide the wrong input cycle and voltage for an Li battery.

$50/lbs, I am going to start a diet.

[///M Houbi]

Removing a lot of weight from the rear part of the M2C might not be the smartest move.

I'd rather start in the front.... bonnet would be very nice and help more towards 50/50 balance. Pricing is a stopper for sure...

[Bill in Marin]

Reviving this thread. Has anyone installed a Lithium Ion battery (LiteBlox or similar) on an M2C that retained all stock functionality, while achieving significant weight savings?

I know of few easier weight savings opportunities.

[SEAT TIME RULES]

I'm installing one of these in the next 3 months.

https://antigravitybatteries.com/pro...tive/ag-h7-rs/

I've run them in 2 other cars with no issues.

In those two Japanese cars I had 5 lb batteries and they still started the cars even in the dead of winter.

Their BMW recommended battery is a "drop in" replacement.

Saves 40lbs....

[SEAT TIME RULES]

Originally Posted by Bill in Marin

Reviving this thread. Has anyone installed a Lithium Ion battery (LiteBlox or similar) on an M2C that retained all stock functionality, while achieving significant weight savings?

I know of few easier weight savings opportunities.

I'm doing the two easiest most cost effective weight reduction items.

A Anti Gravity Lithium drop in battery and the rear seat delete kit I just ordered..

About 100lbs saved...

[Bill in Marin]

Thanks. That’s exactly what I was looking for. I’ve got 2 vehicles (car and Moto) with Antigravity batteries in them already, but hadn’t yet seen this.

For weight savings, I’m planning the battery, exhaust and wheels (763M already installed). That should be ~100lbs. I have kids, so no rear seat delete for me. After that, it gets pretty expensive (Carbon Hood-Trunk-Roof, AP Brakes, Seats).

[Anthony1s]

Originally Posted by Bill in Marin

After that, it gets pretty expensive (Carbon Hood-Trunk-Roof, AP Brakes, Seats).

That's why you have to work your way backwards. Start with the $32,000 Brembo Carbon brakes to shave ~50lbs. Then the $5400 carbon fenders to lose 7lbs. Then the more you buy, the more sense it will make to be buying it. And the better you'll feel about it. You'll be feeling FANTASTIC once you remove the rear seat for FREE and lose ~60lbs. lol

[Bill in Marin]

Did you end up getting the battery? Planning to order next month but wanted to hear if it worked perfectly first.

[SEAT TIME RULES]

Yes battery has been shipped. Expect in next Thur/Fri

[MrOhnoez]

Originally Posted by SEAT TIME RULES

Yes battery has been shipped. Expect in next Thur/Fri

What rear seat delete kit did you go with?
Or you just going naked?

[SEAT TIME RULES]

Originally Posted by MrOhnoez

What rear seat delete kit did you go with?
Or you just going naked?

This one:
https://sternperformance.de/en/186-bmw-m2-competition

Its on a slow boat from Germany right now. Should get it soon and will take pics after its in...

[DanG]

Originally Posted by SEAT TIME RULES

This one:
https://sternperformance.de/en/186-bmw-m2-competition

Its on a slow boat from Germany right now. Should get it soon and will take pics after its in...

If I remember right, you can’t just replace the battery. A new battery needs to be programmed into the car.

[SEAT TIME RULES]

Originally Posted by DanG

If I remember right, you can’t just replace the battery. A new battery needs to be programmed into the car.

I have the proper scanner to "teach" the new battery. It's simple to do..

[AlpsRider]

The Carly coding app will register a new battery as well.

[Anthony1s]

Originally Posted by DanG

If I remember right, you can’t just replace the battery. A new battery needs to be programmed into the car.

My understanding is, you can replace a battery without coding as long as it has the same specs as the old battery. So the same voltage and amps or whatever.

But if the new battery is different, you have to code the car to accept the new specs.

[Poochie]

Originally Posted by Anthony1s

My understanding is, you can replace a battery without coding as long as it has the same specs as the old battery. So the same voltage and amps or whatever.

But if the new battery is different, you have to code the car to accept the new specs.

Actual, anytime the battery is replace with a new or used unit, it needs to be registered to tell the IBS to adjust to the proper charge cycle.

Another thing is the ISTA+ program only allows you to register a battery as low as 80ah only, for the F87 software.

The lithium ion battery that's in the M4 is 68ah, meaning that installing a M4 battery in an M2 is not a simple P&P operation; it requires intricate programming or coding to accept the new battery specs, that goes way beyond the typical, pre-populated battery registration process BMW's software allows.

I must say the M4 lithium battery is pretty light, one can typically lift and carry it with just one hand.


.

[Anthony1s]

Originally Posted by Poochie

Actual, anytime the battery is replace with a new or used unit, it needs to be registered to tell the IBS to adjust to the proper charge cycle.

Well "need" is a strong word. "recommended" and "potentially optimal", I think would be more accurate.

What is going on is that BMW programmed IBS to vary the rate the battery is charged based on battery age and type of battery. With age being the only factor when you replace a battery with one of the same kind. So when you register a new battery, it is resetting the algorithm it's using to charge the battery. I'm not particularly sure this is a good idea to do if you're replacing your battery with a used one.

"The negative battery cable has an electronic control unit on the battery end of it called an intelligent battery sensor (IBS). The IBS measures the state of battery charge and sends this information to the ECU. The ECU uses this information to control how much charging voltage is needed from the alternator to support vehicle electricity needs. A battery deteriorates normally over time and depending upon service demands and driving profile. The IBS reads this and the ECU tells the charging system to increase voltage and amperage output incrementally as the battery matures. Therefore, at battery replacement time, if you don't tell the ECU it has a new battery it will overcharge the new battery causing it to wear out faster.

The registration process takes place in the ECU, which is the main player in this system. Also, when the IBS sees that battery voltage is too low for normal vehicle operation it can start shutting down vehicle functions to conserve power while keeping the vehicle operational. This would be accompanied by a check control warning of excessive battery discharge.”

https://www.1addicts.com/forums/show....php?t=1338304

[Poochie]

Originally Posted by Anthony1s

Well "need" is a strong word. "recommended" and "potentially optimal", I think would be more accurate.

My dumbass friend believed the same as you and didn't bothering registering his new, OEM battery he installed because he didn't want to spend the extra $50.

Within a year, the battery was dead, I mean completely.

So it's one thing to make armchair assumptions about whether or not you "need" to register the replacement battery but it's completely different to witness it before your eyes.

BTW, his new battery, after the one that died, which was registered the second time around, lasted 4 years going into 5.

It's your car and money, so do whatever helps you sleep better at night but factually, if you don't register the replacement battery, it will die prematurely.

Just some friendly advice based on personal experience.

[Anthony1s]

Originally Posted by Poochie

My dumbass friend believed the same as you and didn't bothering registering his new, OEM battery he installed because he didn't want to spend the extra $50.

Within a year, the battery was dead, I mean completely.

So it's one thing to make armchair assumptions about whether or not you "need" to register the replacement battery but it's completely different to witness it before your eyes.

BTW, his new battery, after the one that died, which was registered the second time around, lasted 4 years going into 5.

It's your car and money, so do whatever helps you sleep better at night but factually, if you don't register the replacement battery, it will die prematurely.

Just some friendly advice based on personal experience.

Well no, you're not stating facts. You're stating the experience of your friend, who is a single person, and you have no idea if his battery went through any unordinary circumstances during that year or the condition and age of the battery before hand.

When I said "need is the wrong word" is because you used it in context for used batteries. Which it would be potentially harmful for.

Here are more facts about how the IBS system works. It's apparent to me there are situations where registering a battery could be counter-productive.

https://bimmerscan.com/bmw-intellige...ry-sensor-ibs/

[Poochie]

Originally Posted by Anthony1s

Well no, you're not stating facts. You're stating the experience of your friend, who is a single person, and you have no idea if his battery went through any unordinary circumstances during that year or the condition and age of the battery before hand.

When I said "need is the wrong word" is because you used it in context for used batteries. Which it would be potentially harmful for.

Here are more facts about how the IBS system works. It's apparent to me there are situations where registering a battery could be counter-productive.

https://bimmerscan.com/bmw-intellige...ry-sensor-ibs/

Wow, by "facts" I meant the official technical manual excerpt I provided, not the anecdotal story I used to support it.

https://www.newtis.info/tisv2/a/en/f...older/F6WrZ7vI

But forget it, I already see you're not the type to let supporting data get in way of your argument. Good luck with all that.

For those that actually care to preserve the life of their replacement battery, it certainly needs to be registered, as stipulated by ISTA+ dealer program. Even manufactures like Ford now requires it.

I've done the registration process a few times and with the right software, it takes less than 10 mins. Here's snapshot of the process.