Lightweight batteries. My research and install with OEM-like fitment (with pics).

Captain comic · 01-29-2018, 02:10 AM

Quote:

Originally Posted by torrque

The question was not how the system in the car works. The question was "can the car run without having a fully charged battery at all times, only on alternator?" The answer to that is yes, not only it powers all the systems, it also charges the battery while doing that

And you actually answered how it is achieved.

Thanks guys! In any case - I should be fine if I keep accessory usage to a minimum and won't use anything when engine is shut off. I'm going to try it and I'll post back if I encounter any issues

Going for https://www.amazon.com/East-Penn-Dek...ds=deka+etx30l

Jmontans · 06-14-2018, 07:19 PM

Quote:

Originally Posted by Captain comic

Thanks guys! In any case - I should be fine if I keep accessory usage to a minimum and won't use anything when engine is shut off. I'm going to try it and I'll post back if I encounter any issues

Going for https://www.amazon.com/East-Penn-Dek...ds=deka+etx30l

Any luck? Did this battery work? I’m trying to find an alternative to the oem battery without the crazy weight or price tag

Stealth 135i · 12-14-2018, 09:57 PM

Quote:

Originally Posted by Jmontans

Any luck? Did this battery work? I’m trying to find an alternative to the oem battery without the crazy weight or price tag

I own a 2008 BMW 135i. I was looking at the Braille 21 pound battery to replace my 50+ pound OEM one. After reading through various posts and what people have gone through, I decided it would be best to go with a battery that wouldn't die on me but would still shave off some weight. My search brought me to a reasonably priced battery ($129.99) with 2 year warranty available at Autozone. The Duralast H6-DL battery. Their website claims the specs are as follows; Weight 35.91 lbs, 615 CCA, 765 CA, 95 Reserve Minutes, Group Size 48. When I got home I put it on a scale. To my surprise, it was even lighter than expected at 34.4 pounds. I'll install it soon and update the post in a few weeks for any other enthusiasts looking for info.

[IMG=https://imagizer.imageshack.com/v2/320x240q90/924/yh0CA0.jpg][/IMG]

MILLER335I · 05-17-2019, 06:05 AM

Quote:

Originally Posted by Stealth 135i

I own a 2008 BMW 135i. I was looking at the Braille 21 pound battery to replace my 50+ pound OEM one. After reading through various posts and what people have gone through, I decided it would be best to go with a battery that wouldn't die on me but would still shave off some weight. My search brought me to a reasonably priced battery ($129.99) with 2 year warranty available at Autozone. The Duralast H6-DL battery. Their website claims the specs are as follows; Weight 35.91 lbs, 615 CCA, 765 CA, 95 Reserve Minutes, Group Size 48. When I got home I put it on a scale. To my surprise, it was even lighter than expected at 34.4 pounds. I'll install it soon and update the post in a few weeks for any other enthusiasts looking for info.

[IMG=https://imagizer.imageshack.com/v2/320x240q90/924/yh0CA0.jpg][/IMG]

Still waiting for the update...LOL.

ewicky · 05-17-2019, 04:57 PM

I wonder if anyone has fitted a super-capacitor as a battery for these cars.

I know folks on youtube with simpler cars (camery etc) have been successful.

I could see myself using that on track days. Might have to leave the car in transport mode to reduce vampire draw for when the car is off.

hellokitty · 05-18-2019, 03:56 PM

Replaced my battery with a 30 lb AGM from the BMW i8 and coded it using Protool. Works perfect on my E93.

bjf66 · 05-20-2019, 07:12 AM

Haven't seen anyone install or try these yet, but it seems to be mentioned a lot by people using them around the Nurburgring.

Anyone want to try this?

https://en.liteblox.de/shop/liteblox...nd-motorsport/

hellokitty · 05-20-2019, 12:11 PM

Quote:

Originally Posted by Karura

Haven't seen anyone install or try these yet, but it seems to be mentioned a lot by people using them around the Nurburgring.

Anyone want to try this?

https://en.liteblox.de/shop/liteblox...nd-motorsport/

Proven setup but $$$

SpanKyM3 · 05-21-2019, 05:28 AM

Anyone use the z4m battery?i have read it's a good choice and shaves some lbs,think weight is light 38lbs but can't seem to find the bmw version,only thing pops up is after market battery's.

hellokitty · 05-21-2019, 01:11 PM

Quote:

Originally Posted by SpanKyM3

Anyone use the z4m battery?i have read it's a good choice and shaves some lbs,think weight is light 38lbs but can't seem to find the bmw version,only thing pops up is after market battery's.

The BMW i8 battery is 30 lbs and works great on my E93 335is.

SpanKyM3 · 05-21-2019, 10:32 PM

Quote:

Originally Posted by hellokitty

The BMW i8 battery is 30 lbs and works great on my E93 335is.

Part number?

hellokitty · 05-21-2019, 10:33 PM

Quote:

Originally Posted by SpanKyM3

Quote:

Originally Posted by hellokitty

The BMW i8 battery is 30 lbs and works great on my E93 335is.

Part number?

Here you go

Emilime75 · 05-21-2019, 11:45 PM

Quote:

Originally Posted by hellokitty

Here you go

So what did you register your 50AH battery as? It doesn't look like 50 is an option for AGM.

hellokitty · 05-21-2019, 11:51 PM

Quote:

Originally Posted by Emilime75

Quote:

Originally Posted by hellokitty

Here you go

So what did you register your 50AH battery as? It doesn't look like 50 is an option for AGM.

I raised this issue with the developers of Pro Tool. They said use the next highest available setting (60Ah).

Apparently this is the same way dealers do the coding (choose the next highest available setting).

MILLER335I · 05-13-2020, 02:54 AM

61219364597 battery is NLA, is there a replacement?

Steve Sas · 06-12-2020, 11:13 PM

LifePo4 12.8v battery maybe possible as a light weight option.

Currently working in my 335i, still testing.

https://www.e90post.com/forums/showt...0#post26304850

MILLER335I · 06-13-2020, 02:08 AM

Quote:

Originally Posted by Steve Sas

LifePo4 12.8v battery maybe possible as a light weight option.

Currently working in my 335i, still testing.

https://www.e90post.com/forums/showt...0#post26304850

I bought an Antigravity H6-60-RS battery. Just installed it with the bluetooth battery monitor and all is great so far!

Steve Sas · 07-18-2020, 08:02 AM

Just an update. Car has been running well since.
No issues. Seems like you can run light weight lithium batteries in these cars after all.

MILLER335I · 07-18-2020, 04:08 PM

Good to hear! I love the jump start ability on my battery!

e30h26 · 10-28-2020, 12:45 PM

Quote:

Originally Posted by Steve Sas

LifePo4 12.8v battery maybe possible as a light weight option.

Currently working in my 335i, still testing.

https://www.e90post.com/forums/showt...0#post26304850

Steve, have you a part number and any install information?

Steve Sas · 10-28-2020, 10:03 PM

Hi e30h26,
You should be able to use any LifePO4 battery in 335i as long as the charging voltage stays at 14v and below. These batteries have over voltage/current protect circuitry and if the voltage on the battery exceeds 14.6v the battery will disconnect from the car while its running which is a big no no as you know. The voltage on car side will spike up to 18v as the alternator needs the battery to regulate correctly.
This is the reason why I needed to disconnect the alternator ignition signal. I didn't expect the alternator to work in this case but it seemed to run in some sort of default mode. I also have the alternator from the 135i as my engine was changed from one.
It doesnt have the Bit Serial Interface that the 335i alternator has, so im not 100% sure you will get the same result.
Maybe monitor the battery voltage in normal mode and see how it charges. The DME will alter voltage depending on demands from different system in the car. Then disconnect the the plug on the alternator and see what happens.
In default mode its like the older cars where the alternator targets 14v regulation only.

Any way, I installed this battery.

https://www.aliexpress.com/item/3301...7ecb6271bogjtE

Not sure if still available, brought 15 months ago.

Paid $450 AUD+tax delivered. Uses A123 system cells but rating is really 42ah.
I did notice engine kicks over faster and starts quicker.

I would recommend you source battery locally for warranty reasons. Just make sure you have 900CCA with 40ah lithium capacity. Many companies use Pb equivalent ratings. Make sure you know what cells are in the battery and use them as the capacity rating.

Hope this helps.

05-17-2019, 04:57 PM	#49
ewicky Lieutenant 204 Rep 525 Posts Drives: '07 335xi 4D AT Join Date: Jan 2017 Location: Seattle, WA iTrader: (0)	I wonder if anyone has fitted a super-capacitor as a battery for these cars. I know folks on youtube with simpler cars (camery etc) have been successful. I could see myself using that on track days. Might have to leave the car in transport mode to reduce vampire draw for when the car is off.
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05-18-2019, 03:56 PM	#50
hellokitty Brigadier General 2894 Rep 3,726 Posts Drives: '17 M3 ZCP DCT Join Date: Jul 2010 Location: Southern California iTrader: (2)	Replaced my battery with a 30 lb AGM from the BMW i8 and coded it using Protool. Works perfect on my E93. __________________ 2017 F80 M3 ZCP / AA GESI DPs / Akrapovic Evo / BBS FI-R 19" / Bend Calibration ECUTEK Flex Fuel \| Bilstein B16 DDC + CS EDC / BMC Filters / BMS OCC / CSF HE / ESS CP / Nitto NT555R2 / PD Crank Hub / SPL Suspension / Uniden R7 / Wagner Top Mount IC 2021 Mini GP3 / BMC Filters / BM3 / Cary Jordan E30 / Wagner IC / Remus Race
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05-20-2019, 07:12 AM	#51
bjf66 Banned 51 Rep 457 Posts Drives: E92 335is DCT Join Date: Mar 2011 Location: Wyoming iTrader: (0)	Haven't seen anyone install or try these yet, but it seems to be mentioned a lot by people using them around the Nurburgring. Anyone want to try this? https://en.liteblox.de/shop/liteblox...nd-motorsport/
	Appreciate 0 Quote

05-21-2019, 05:28 AM	#53
SpanKyM3 Private 3 Rep 60 Posts Drives: 335i Join Date: Aug 2008 Location: Location iTrader: (0)	Anyone use the z4m battery?i have read it's a good choice and shaves some lbs,think weight is light 38lbs but can't seem to find the bmw version,only thing pops up is after market battery's.
	Appreciate 0 Quote

05-13-2020, 02:54 AM	#59
MILLER335I Captain 68 Rep 763 Posts Drives: BMW E90 Dinan stage 3 335I Join Date: Mar 2017 Location: Peoples Republic of California iTrader: (11)	61219364597 battery is NLA, is there a replacement? __________________ 2007 E90 335i N54 Montego blue with grey Dakota leather interior
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06-12-2020, 11:13 PM	#60
Steve Sas Private First Class 24 Rep 144 Posts Drives: BMW 335i 2008 Join Date: May 2020 Location: Sydney iTrader: (0)	LifePo4 12.8v battery maybe possible as a light weight option. Currently working in my 335i, still testing. https://www.e90post.com/forums/showt...0#post26304850
	Appreciate 0 Quote

07-18-2020, 08:02 AM	#62
Steve Sas Private First Class 24 Rep 144 Posts Drives: BMW 335i 2008 Join Date: May 2020 Location: Sydney iTrader: (0)	Just an update. Car has been running well since. No issues. Seems like you can run light weight lithium batteries in these cars after all.
	Appreciate 0 Quote

07-18-2020, 04:08 PM	#63
MILLER335I Captain 68 Rep 763 Posts Drives: BMW E90 Dinan stage 3 335I Join Date: Mar 2017 Location: Peoples Republic of California iTrader: (11)	Good to hear! I love the jump start ability on my battery! __________________ 2007 E90 335i N54 Montego blue with grey Dakota leather interior
	Appreciate 0 Quote

10-28-2020, 10:03 PM	#65
Steve Sas Private First Class 24 Rep 144 Posts Drives: BMW 335i 2008 Join Date: May 2020 Location: Sydney iTrader: (0)	Hi e30h26, You should be able to use any LifePO4 battery in 335i as long as the charging voltage stays at 14v and below. These batteries have over voltage/current protect circuitry and if the voltage on the battery exceeds 14.6v the battery will disconnect from the car while its running which is a big no no as you know. The voltage on car side will spike up to 18v as the alternator needs the battery to regulate correctly. This is the reason why I needed to disconnect the alternator ignition signal. I didn't expect the alternator to work in this case but it seemed to run in some sort of default mode. I also have the alternator from the 135i as my engine was changed from one. It doesnt have the Bit Serial Interface that the 335i alternator has, so im not 100% sure you will get the same result. Maybe monitor the battery voltage in normal mode and see how it charges. The DME will alter voltage depending on demands from different system in the car. Then disconnect the the plug on the alternator and see what happens. In default mode its like the older cars where the alternator targets 14v regulation only. Any way, I installed this battery. https://www.aliexpress.com/item/3301...7ecb6271bogjtE Not sure if still available, brought 15 months ago. Paid $450 AUD+tax delivered. Uses A123 system cells but rating is really 42ah. I did notice engine kicks over faster and starts quicker. I would recommend you source battery locally for warranty reasons. Just make sure you have 900CCA with 40ah lithium capacity. Many companies use Pb equivalent ratings. Make sure you know what cells are in the battery and use them as the capacity rating. Hope this helps.
	Appreciate 0 Quote