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Battery type...a bit confused...

Specific discussion about the E89 2009 Z4 (sDrive35is, sDrive35i, sDrive30i, sDrive23i)
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ph001
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Battery type...a bit confused...

Post by ph001 » Wed Nov 29, 2017 6:28 pm

Don't get too caught up on the Ah or CCA matching exactly - it's not that critical. Just make sure it's the same chemistry (AGM / wet etc), the dimensions are the same and the terminal arrangement.

AGM type batteries are charged at a slightly higher voltage to wet as they tend to have a higher acid weight, so for most efficient charging your charger should have an AGM setting.
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Battery type...a bit confused...

Post by 4zwmb » Wed Nov 29, 2017 6:38 pm

ph001 wrote: Wed Nov 29, 2017 6:28 pm Don't get too caught up on the Ah or CCA matching exactly - it's not that critical. Just make sure it's the same chemistry (AGM / wet etc), the dimensions are the same and the terminal arrangement.

AGM type batteries are charged at a slightly higher voltage to wet as they tend to have a higher acid weight, so for most efficient charging your charger should have an AGM setting.
Hey there, I read your inputs about all this 'registering thing for the new battery syndrome' and to be honest, I kind of agree with you. Very interesting knowledge and stuff you reasoned out there. Would you say the battery in my picture is AGM? I guess so right? I found a battery which is varta and it has the following specs: 71Ah and 770CCA. Very close to my old one that needs replacement. What do you think?

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Battery type...a bit confused...

Post by 4zwmb » Wed Nov 29, 2017 6:38 pm

Smartbear wrote: Wed Nov 29, 2017 6:26 pm It’s a Sep 2013 lci car :thumbsup:
Rob
Oh...I believe they started doing them on z4 e89 from 2012 onwards perhaps?

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Battery type...a bit confused...

Post by Smartbear » Wed Nov 29, 2017 6:40 pm

ph001 wrote: Wed Nov 29, 2017 6:28 pm Don't get too caught up on the Ah or CCA matching exactly - it's not that critical. Just make sure it's the same chemistry (AGM / wet etc), the dimensions are the same and the terminal arrangement.

AGM type batteries are charged at a slightly higher voltage to wet as they tend to have a higher acid weight, so for most efficient charging your charger should have an AGM setting.
I thought mine charged at a higher rate than my previous zeds, it seems to sit at 14.8v when driving :?
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e89 Sdrive 30i, this ones busted, pass me another...
e85 3.0si sold

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Battery type...a bit confused...

Post by ph001 » Wed Nov 29, 2017 6:57 pm

4zwmb wrote: Wed Nov 29, 2017 6:38 pm
ph001 wrote: Wed Nov 29, 2017 6:28 pm Don't get too caught up on the Ah or CCA matching exactly - it's not that critical. Just make sure it's the same chemistry (AGM / wet etc), the dimensions are the same and the terminal arrangement.

AGM type batteries are charged at a slightly higher voltage to wet as they tend to have a higher acid weight, so for most efficient charging your charger should have an AGM setting.
Hey there, I read your inputs about all this 'registering thing for the new battery syndrome' and to be honest, I kind of agree with you. Very interesting knowledge and stuff you reasoned out there. Would you say the battery in my picture is AGM? I guess so right? I found a battery which is varta and it has the following specs: 71Ah and 770CCA. Very close to my old one that needs replacement. What do you think?
I'm fairly certain all the E89 are AGM. 71Ah, 770CCA is absolutely fine.



Smartbear wrote: Wed Nov 29, 2017 6:40 pm
ph001 wrote: Wed Nov 29, 2017 6:28 pm Don't get too caught up on the Ah or CCA matching exactly - it's not that critical. Just make sure it's the same chemistry (AGM / wet etc), the dimensions are the same and the terminal arrangement.

AGM type batteries are charged at a slightly higher voltage to wet as they tend to have a higher acid weight, so for most efficient charging your charger should have an AGM setting.
I thought mine charged at a higher rate than my previous zeds, it seems to sit at 14.8v when driving :?
Rob
That sounds about spot on for AGM, but it does depend on temperature a little.
2007 E85 Z4 3.0Si manual :driving:
19" CSL's | Eibach Springs | Aeroskirts | Z4M front bumper | Clear brake light | ZHP | RCH+| Stubby

2004 E46 M3 coupe manual - gone but not forgotten.

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Battery type...a bit confused...

Post by 4zwmb » Wed Nov 29, 2017 7:03 pm

ph001 thanks for all the information. I think I will go and buy this battery then. I hope I wont have any troubles, I would not care that much if the battery dies sooner because of not registering it, I would be more concerned if it harms the car's electronics which in my opinion, should absolutely not.

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Battery type...a bit confused...

Post by 4zwmb » Wed Nov 29, 2017 7:04 pm

P.s all the cars with start-stop function have a botton near or just above the start button right? Just making sure, mine is not with start-stop function. What do you think Smartbear?

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Battery type...a bit confused...

Post by Smartbear » Wed Nov 29, 2017 7:36 pm

4zwmb wrote: Wed Nov 29, 2017 7:04 pm P.s all the cars with start-stop function have a botton near or just above the start button right? Just making sure, mine is not with start-stop function. What do you think Smartbear?
The start/stop button is next to the heated seat control by the ashtray :thumbsup:
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e89 Sdrive 20i, plenty of mumbo & good economy-the thinking bears z4
e89 Sdrive 30i, this ones busted, pass me another...
e85 3.0si sold

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Battery type...a bit confused...

Post by 4zwmb » Wed Nov 29, 2017 7:44 pm

Smartbear wrote: Wed Nov 29, 2017 7:36 pm
4zwmb wrote: Wed Nov 29, 2017 7:04 pm P.s all the cars with start-stop function have a botton near or just above the start button right? Just making sure, mine is not with start-stop function. What do you think Smartbear?
The start/stop button is next to the heated seat control by the ashtray :thumbsup:
Rob

:? Would you care to provide me with a photo please? I am very curious I guess!

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Battery type...a bit confused...

Post by Nictrix » Wed Nov 29, 2017 7:49 pm

Im sure its only the 2.0L that have start/stop.
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Battery type...a bit confused...

Post by 4zwmb » Wed Nov 29, 2017 7:57 pm

Nictrix wrote: Wed Nov 29, 2017 7:49 pm Im sure its only the 2.0L that have start/stop.
Ah there is the fix for my curiosity! I think you are right, all the bmw z4s I have seen here are bigger than 2.0L, hence why I never saw one with start/stop function.

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Battery type...a bit confused...

Post by Smartbear » Wed Nov 29, 2017 8:37 pm

4zwmb wrote: Wed Nov 29, 2017 7:44 pm
Smartbear wrote: Wed Nov 29, 2017 7:36 pm
4zwmb wrote: Wed Nov 29, 2017 7:04 pm P.s all the cars with start-stop function have a botton near or just above the start button right? Just making sure, mine is not with start-stop function. What do you think Smartbear?
The start/stop button is next to the heated seat control by the ashtray :thumbsup:
Rob

:? Would you care to provide me with a photo please? I am very curious I guess!
Here you go,
IMAG5169.jpg
IMAG5169.jpg (104.76 KiB) Viewed 829 times
Rob
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e89 Sdrive 20i, plenty of mumbo & good economy-the thinking bears z4
e89 Sdrive 30i, this ones busted, pass me another...
e85 3.0si sold

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Battery type...a bit confused...

Post by 4zwmb » Wed Nov 29, 2017 8:42 pm

Oh the off button you mean right?

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Battery type...a bit confused...

Post by Kugaman1 » Thu Nov 30, 2017 7:24 am

Yes its the off button.....
Ive coded mine to “remember last state” so once I turned it off, it stays off and the light is covered by a bit of black tape!

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Battery type...a bit confused...

Post by Z4M-2006 » Thu Nov 30, 2017 9:02 am

AGM and lead acid batteries charge differently

As a rule of thumb, if the car has IBS then it " should " be registered..it has nothing to do with stop / start capability


Put simply, as the battery degrades the IBS senses state of charge, the IBS will then try and maintain the battery to add life.. which usually means the amperage is increased to help maintain full charge.

If the new battery isn't registered then the IBS will be in the incorrect mode to receive the new battery and maintain accordingly ..

I have seen non registration cause issues, and then again some people can pop on a battery that's exactly the same and have no issues

Seeing as it's only a 5 minute job to register the battery, I always do it to avoid any issues in the future

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