Advice on battery replacement for E90

GoRomeo · 01-05-2016, 10:24 PM

Quote:

Originally Posted by wildcatcrazy

Not registering it will cause the vehicle to overcharge it because it still thinks the old battery is in there. These cars have a very intelligent charging system... You may not see any short term effects, but it will cut the battery life in the end.

Guys i will repeate myself one more time. ACID LEAD BATTERIES DO NOT REQUIRE REGISTRATION. ONLY AGM KIND DO. SO WHITE COLOR BATTERIES ARE ACID LEAD. BLACK BATTERIES ARE AGM.

YOUR WELCOME

kaigoss69 · 01-06-2016, 06:38 AM

Quote:

Originally Posted by GoRomeo

Quote:

Originally Posted by wildcatcrazy

Not registering it will cause the vehicle to overcharge it because it still thinks the old battery is in there. These cars have a very intelligent charging system... You may not see any short term effects, but it will cut the battery life in the end.

Guys i will repeate myself one more time. ACID LEAD BATTERIES DO NOT REQUIRE REGISTRATION. ONLY AGM KIND DO. SO WHITE COLOR BATTERIES ARE ACID LEAD. BLACK BATTERIES ARE AGM.

YOUR WELCOME

Based on what?

Kevin_The_Clean1 · 01-08-2016, 05:26 AM

Quote:

Originally Posted by GoRomeo

Guys i will repeate myself one more time. ACID LEAD BATTERIES DO NOT REQUIRE REGISTRATION. ONLY AGM KIND DO. SO WHITE COLOR BATTERIES ARE ACID LEAD. BLACK BATTERIES ARE AGM.

YOUR WELCOME

I had no idea about this until now. So I'm glad you told us this.

cdgatti · 01-08-2016, 12:07 PM

This is a good article on what is needed when replacing a battery and why.

http://oppositelock.kinja.com/replac...ous-1681775778

The Carly app will let you merely register a like for like battery change or you can do what I did and change from a lead acid to an AGM battery and program and register.

kaigoss69 · 01-08-2016, 02:45 PM

Quote:

Originally Posted by cdgatti

This is a good article on what is needed when replacing a battery and why.

http://oppositelock.kinja.com/replac...ous-1681775778

The Carly app will let you merely register a like for like battery change or you can do what I did and change from a lead acid to an AGM battery and program and register.

Thanks for the link. Shows that GoRomeo doesn't know WHAT HE'S TALKING ABOUT. I have read this same info on many other sites, and also in posts from certified BMW mechanics.

Which AGM did you end up buying? - The lead acid battery I replaced 2 years ago is now showing signs of weakening, and I need to replace it. I do wonder if this is due to the battery capacity being about 10% higher than OEM, and the charging rate not being an exact match.

cdgatti · 01-08-2016, 04:19 PM

I went with this: DieHard Advanced Gold AGM Battery - Group Size 49
It is rated at 92ah, but the carly app had 90ah as the closest setting so I used that. Been just a little over a year now, so obvioulsy too early to know long term success, but everything has been flawless so far.

Works great for extended DSP tuning sessions!

Wolfgang Schneiderhan · 01-08-2016, 05:46 PM

As the battery ages, it's storage capacity (Ampere Hours) becomes gradually diminished. The car keeps track of this and adjusts the charging profile accordingly. A new battery should be registered as that will ensure it receives a full charge at the maximum safe current. I'm sure we can notice plenty of examples of people who have changed the battery and not registered it, with no ill effects. It certainly is possible. However, I recommend registering a new battery for the aforementioned reason.

Worth noting, if the new battery is not receiving a full charge (because it was not registered), its useful service life may be shortened as well. On a flooded lead-acid battery I would think that under-charging is almost worse than over-charging, as with the latter, the electrolyte will simply boil off if gassing occurs.

If you want to save some money buy a battery from Auto Zone (or wherever you like) and install it, and have your local indy shop register it. It should be no more than about $50 and well worth the money.

GoRomeo · 01-09-2016, 12:53 AM

Quote:

Originally Posted by kaigoss69

Thanks for the link. Shows that GoRomeo doesn't know WHAT HE'S TALKING ABOUT. I have read this same info on many other sites, and also in posts from certified BMW mechanics.

Which AGM did you end up buying? - The lead acid battery I replaced 2 years ago is now showing signs of weakening, and I need to replace it. I do wonder if this is due to the battery capacity being about 10% higher than OEM, and the charging rate not being an exact match.

Thats ur issue. Different specs equals needing coding and registering. Of course i know what im talking about

I replaced mine 4 yrs ago same specs even though part # is different due to being replaced with battery with more CCA. No inpact on the car. Just an FYI. Cheers!

Kevin_The_Clean1 · 01-09-2016, 02:58 AM

I've got a fully loaded 2011 335i sedan with the HK audio option. Which Diehard battery fits best for my car… ?

I already know how many CCA & AH figure I need to match the factory unit. But I keep getting the "increased battery discharge" on my display & need to do this quickly.

Everyone says Group size 49. But all cars are different depending on the year it was built & what options is comes equipped with.

01-08-2016, 12:07 PM	#48
cdgatti Colonel 255 Rep 2,547 Posts Drives: e90 328i Join Date: May 2011 Location: KY iTrader: (4)	This is a good article on what is needed when replacing a battery and why. http://oppositelock.kinja.com/replac...ous-1681775778 The Carly app will let you merely register a like for like battery change or you can do what I did and change from a lead acid to an AGM battery and program and register. __________________ OEM Black grill and Blackline tails - LCI halogens with Lux V2 coded as DRL - 3M Crystalline - BMS PBX - OEM Euro Airbox with K&N - Hardwired CTEK - Bilstein B6 w/OEM springs and SP perches - Conti DWS06 - HiFi-Helix DSP - JLAudio HD/XD-Morel - CD changer trim - AE optical out Last edited by cdgatti; 01-08-2016 at 12:21 PM..
	Appreciate 0 Quote

01-08-2016, 04:19 PM	#50
cdgatti Colonel 255 Rep 2,547 Posts Drives: e90 328i Join Date: May 2011 Location: KY iTrader: (4)	I went with this: DieHard Advanced Gold AGM Battery - Group Size 49 It is rated at 92ah, but the carly app had 90ah as the closest setting so I used that. Been just a little over a year now, so obvioulsy too early to know long term success, but everything has been flawless so far. Works great for extended DSP tuning sessions! __________________ OEM Black grill and Blackline tails - LCI halogens with Lux V2 coded as DRL - 3M Crystalline - BMS PBX - OEM Euro Airbox with K&N - Hardwired CTEK - Bilstein B6 w/OEM springs and SP perches - Conti DWS06 - HiFi-Helix DSP - JLAudio HD/XD-Morel - CD changer trim - AE optical out Last edited by cdgatti; 01-09-2016 at 12:59 PM..
	Appreciate 0 Quote

01-08-2016, 05:46 PM	#51
Wolfgang Schneiderhan New Member 2 Rep 17 Posts Drives: 2007 328i (E90/N51) Join Date: Apr 2014 Location: Los Angeles, CA iTrader: (0)	As the battery ages, it's storage capacity (Ampere Hours) becomes gradually diminished. The car keeps track of this and adjusts the charging profile accordingly. A new battery should be registered as that will ensure it receives a full charge at the maximum safe current. I'm sure we can notice plenty of examples of people who have changed the battery and not registered it, with no ill effects. It certainly is possible. However, I recommend registering a new battery for the aforementioned reason. Worth noting, if the new battery is not receiving a full charge (because it was not registered), its useful service life may be shortened as well. On a flooded lead-acid battery I would think that under-charging is almost worse than over-charging, as with the latter, the electrolyte will simply boil off if gassing occurs. If you want to save some money buy a battery from Auto Zone (or wherever you like) and install it, and have your local indy shop register it. It should be no more than about $50 and well worth the money. __________________ Mit freundlichen Grüßen Wolfgang
	Appreciate 0 Quote

01-09-2016, 02:58 AM	#53
Kevin_The_Clean1 Brigadier General 3434 Rep 4,057 Posts Drives: 2020 X3 MC Join Date: Jan 2016 Location: Campbell, CA iTrader: (11)	I've got a fully loaded 2011 335i sedan with the HK audio option. Which Diehard battery fits best for my car… ? I already know how many CCA & AH figure I need to match the factory unit. But I keep getting the "increased battery discharge" on my display & need to do this quickly. Everyone says Group size 49. But all cars are different depending on the year it was built & what options is comes equipped with.
	Appreciate 0 Quote