Does the G20 have a Li-ion or AGM battery?

modpup · 09-13-2019, 09:22 AM

Hi everyone.

Can anyone confirm if the battery in a 2019 330i msport is lithium or agm.

My dealer has said lithium. Now they say agm.

My bmw trickle charger has an option for switching from agm to lithium.

Want to make sure I have the correct settings.

Thanks

upsidedownfunnel · 09-13-2019, 12:29 PM

It has both. There is a small lithium-ion battery under the hood and a larger AGM battery in the trunk. I'm not exactly sure what it's for, but I think the li-ion battery is to allow for faster charging and discharging when needed while the AGM is for starting the car and steady standby power.

LogicalApex · 09-13-2019, 04:20 PM

If I had to guess...

The Lithium battery powers Engine Start - Stop as it can deliver steady power a lot more reliably and charge quickly. And for that moment when the car has to turn back on and you have voltage drops this battery would be keeping electronics on steady voltage (electronics HATE spikes and dips).

The AGM battery would be powering everything else...

But I'm not an automotive engineer so there may be a bit off in my assumption...

modpup · 09-13-2019, 07:26 PM

Thank you. Well that’s interesting. Now my dealer says it only has a agm.

Shouldn’t they know this stuff. 😳

mzdial · 09-13-2019, 08:57 PM

Quote:

Originally Posted by modpup

Thank you. Well that’s interesting. Now my dealer says it only has a agm.

Shouldn’t they know this stuff. 😳

Exactly. Kinda sad.

x986 · 09-18-2019, 08:44 PM

Definitely AGM, but there may be a secondary LI bat.

Patrick852 · 09-19-2019, 07:57 AM

I searched but couldn't find any thread regarding the battery location. BMW batteries are traditionally inside the trunk, but the G20 is not like the F30 where it hides on the right hand side corner. Does anyone knows where is it located?

StevenDS85 · 09-19-2019, 08:13 AM

It’s under the trunk floor.

tturedraider · 09-19-2019, 08:37 AM

Quote:

Originally Posted by StevenDS85

It’s under the trunk floor.

Correct. https://g20.bimmerpost.com/forums/sh...92&postcount=9

There is also a small battery under the hood near the firewall.

danfratamico · 09-19-2019, 04:39 PM

My friend leased an M340i xDrive and I noticed in his engine bay (circled in the photo), other than the battery in the trunk, there is an additional battery supplied by LG Chem. Is this BMW's introduction into the 48V low-amperage electrical system? If so, does anyone know what it would power/assist?

Patrick852 · 09-19-2019, 04:48 PM

Quote:

Originally Posted by StevenDS85

It’s under the trunk floor.

That's what I guess too, I miss the lower storage compartment in the F30, it seems no easy access to the battery, does it require screw to open?

Patrick852 · 09-19-2019, 04:56 PM

Quote:

Originally Posted by tturedraider

Correct. https://g20.bimmerpost.com/forums/sh...92&postcount=9

There is also a small battery under the hood near the firewall.

It is no easy access to it, you have to remove all the items in the trunk and find a way to lift up the cover. I believe it gives you better weight balance in the lower middle location than it was on the right hand corner.

Thanks for the picture illustration!

kiwirick · 04-06-2020, 11:34 PM

Quote:

Originally Posted by danfratamico

My friend leased an M340i xDrive and I noticed in his engine bay (circled in the photo), other than the battery in the trunk, there is an additional battery supplied by LG Chem. Is this BMW's introduction into the 48V low-amperage electrical system? If so, does anyone know what it would power/assist?

My M340i xDrive (Sept 2019 build) does not have the under-hood lithium battery that you've circled. There is just an empty space there. The battery in the boot/trunk is an AGM battery. I'm mystified - does anyone know more?

greekcs · 04-08-2020, 02:41 PM

12/19 build here. Not sure why the second photo is upside down.

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Ghozthunter · 04-09-2020, 12:38 AM

The LG li-on battery must be for the engine start and stop. I unplugged the battery and the car still starts up with no check engine light. I did not try the engine start-stop though.

Vratis · 04-11-2020, 07:08 AM

Quote:

Originally Posted by kiwirick

Quote:

Originally Posted by danfratamico

My friend leased an M340i xDrive and I noticed in his engine bay (circled in the photo), other than the battery in the trunk, there is an additional battery supplied by LG Chem. Is this BMW's introduction into the 48V low-amperage electrical system? If so, does anyone know what it would power/assist?

[IMG]

View post on imgur.com

[/IMG]

My M340i xDrive (Sept 2019 build) does not have the under-hood lithium battery that you've circled. There is just an empty space there. The battery in the boot/trunk is an AGM battery. I'm mystified - does anyone know more?

Quote:

Originally Posted by kiwirick

Quote:

Originally Posted by danfratamico

My friend leased an M340i xDrive and I noticed in his engine bay (circled in the photo), other than the battery in the trunk, there is an additional battery supplied by LG Chem. Is this BMW's introduction into the 48V low-amperage electrical system? If so, does anyone know what it would power/assist?

[IMG]

View post on imgur.com

[/IMG]

My M340i xDrive (Sept 2019 build) does not have the under-hood lithium battery that you've circled. There is just an empty space there. The battery in the boot/trunk is an AGM battery. I'm mystified - does anyone know more?

My M340i xDrive (Sep 2019 build, Europe model) doesn't have the under-hood lithium battery as well ...

Just 105Ah AGM battery behind...

gsantopaolo · 04-11-2020, 10:35 AM

Quote:

Originally Posted by Vratis

My M340i xDrive (Sep 2019 build, Europe model) doesn't have the under-hood lithium battery as well ...

Just 105Ah AGM battery behind...

Just checked my 330i xdrive msport station wagon, no li-ion battery under-hood as well

phayze · 05-16-2020, 10:11 AM

Any idea why some have and some don’t have?

Poochie · 05-16-2020, 03:14 PM

Quote:

Originally Posted by phayze

Any idea why some have and some don't have?

The additional 12 V lithium ion starter / auxiliary battery is to power vehicles that opted for the flux capacitor

J/k, it's an additional battery that's fitted to vehicles with added options, that BMW determines might need it.

.

NYC_340i · 05-24-2020, 08:13 PM

Was curios so I checked mine and I do have that second battery under the hood.

Sept 2019 build M340xi with the following options:

Premium pkg
Executive pkg
Driver's assistance pkg
Driver's assistance pro pkg
Remote Start
Harmon Kardon
Wireless charging

Now if someone has a similar build and doesn't have it the mystery just deepens lol

twin's Turbo · 05-26-2020, 11:54 AM

I have the second battery under the hood also. M340i X-drive, with Premium Excellence Package.

twin's Turbo · 05-26-2020, 12:14 PM

There are two wiring layouts shown on TIS.

One with Aux battery, Second battery is G6 and is referenced as Aux battery

https://www.newtis.info/tisv2/a/en/g...tem/1Vndawcu6B

one without.

https://www.newtis.info/tisv2/a/en/g...tem/1VndlaDJfs

09-13-2019, 09:22 AM	#1
modpup New Member 7 Rep 13 Posts Drives: 2019 bmw 330i Join Date: Aug 2019 Location: Saskatoon iTrader: (0)	Does the G20 have a Li-ion or AGM battery? Hi everyone. Can anyone confirm if the battery in a 2019 330i msport is lithium or agm. My dealer has said lithium. Now they say agm. My bmw trickle charger has an option for switching from agm to lithium. Want to make sure I have the correct settings. Thanks
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09-13-2019, 12:29 PM	#2
upsidedownfunnel Colonel 1996 Rep 2,499 Posts Drives: 2014 335i Join Date: Jul 2017 Location: SoCal iTrader: (4) Garage List 2014 BMW 335i [0.00]	It has both. There is a small lithium-ion battery under the hood and a larger AGM battery in the trunk. I'm not exactly sure what it's for, but I think the li-ion battery is to allow for faster charging and discharging when needed while the AGM is for starting the car and steady standby power.
	Appreciate 4 mzdial114.50 WXdrivefun280.00 bavarianride1505.00 reber90@gmail.com0.00 Quote

09-13-2019, 04:20 PM	#3
LogicalApex Colonel 2024 Rep 2,945 Posts Drives: 2020 BMW 530xe Join Date: Jul 2019 Location: Farmington, NY iTrader: (0) Garage List 2020 BMW 530xe [0.00]	If I had to guess... The Lithium battery powers Engine Start - Stop as it can deliver steady power a lot more reliably and charge quickly. And for that moment when the car has to turn back on and you have voltage drops this battery would be keeping electronics on steady voltage (electronics HATE spikes and dips). The AGM battery would be powering everything else... But I'm not an automotive engineer so there may be a bit off in my assumption...
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09-13-2019, 07:26 PM	#4
modpup New Member 7 Rep 13 Posts Drives: 2019 bmw 330i Join Date: Aug 2019 Location: Saskatoon iTrader: (0)	Thank you. Well that’s interesting. Now my dealer says it only has a agm. Shouldn’t they know this stuff. 😳
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09-18-2019, 08:44 PM	#6
x986 First Lieutenant 96 Rep 378 Posts Drives: '16 340, ex e92 335, ex e46 M3 Join Date: Jan 2007 Location: North Bay Area, CA iTrader: (0) Garage List 1996 Ferrari F355 [0.00] 2014 Porsche Cayman S [0.00] 2020 M340i [0.00]	Definitely AGM, but there may be a secondary LI bat.
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09-19-2019, 07:57 AM	#7
Patrick852 Private First Class 66 Rep 159 Posts Drives: 15 320iED, 18 X2 sDrive20i MSX Join Date: Mar 2017 Location: Hong Kong iTrader: (0)	I searched but couldn't find any thread regarding the battery location. BMW batteries are traditionally inside the trunk, but the G20 is not like the F30 where it hides on the right hand side corner. Does anyone knows where is it located?
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09-19-2019, 08:13 AM	#8
StevenDS85 I ///M Fan 336 Rep 367 Posts Drives: BMW 330i M-Sport Join Date: Apr 2019 Location: Belgium iTrader: (0)	It’s under the trunk floor.
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09-19-2019, 04:39 PM	#10
danfratamico Private 17 Rep 92 Posts Drives: 2007 BMW 335xi Join Date: Jun 2015 Location: Elkins Park, PA iTrader: (0) Garage List 2007 BMW 335xi [0.00]	48V Battery in M340 Engine Bay? My friend leased an M340i xDrive and I noticed in his engine bay (circled in the photo), other than the battery in the trunk, there is an additional battery supplied by LG Chem. Is this BMW's introduction into the 48V low-amperage electrical system? If so, does anyone know what it would power/assist?
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04-08-2020, 02:41 PM	#14
greekcs Major 773 Rep 1,113 Posts Drives: 2020 M340i xDrive Join Date: Jan 2010 Location: Long Island, NY iTrader: (0)	12/19 build here. Not sure why the second photo is upside down. __________________ 2003 11/02 Steel Gray Metallic on Red M3 - SMGII - VF570 - SUPERSPRINT - KW - BBS - CSL ROOF SOLD 2015 09/14 Alpine White on Red 435i xDrive MPPK - Expensive black vinyl with special lettering. SOLD 2020 12/19 Mineral Gray Metallic on Black Vinyl interior M340i xDrive
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04-09-2020, 12:38 AM	#15
Ghozthunter Eleet Tech 181 Rep 295 Posts Drives: a bimmer Join Date: Feb 2020 Location: Houston, TX iTrader: (1)	The LG li-on battery must be for the engine start and stop. I unplugged the battery and the car still starts up with no check engine light. I did not try the engine start-stop though.
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05-16-2020, 10:11 AM	#18
phayze Second Lieutenant 29 Rep 207 Posts Drives: BMW Join Date: Nov 2019 Location: Singapore iTrader: (0)	Any idea why some have and some don’t have?
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05-24-2020, 08:13 PM	#20
NYC_340i Lieutenant 207 Rep 547 Posts Drives: '20 M340i xDrive, '11 X3 28i Join Date: Jun 2011 Location: NYC iTrader: (0)	Was curios so I checked mine and I do have that second battery under the hood. Sept 2019 build M340xi with the following options: Premium pkg Executive pkg Driver's assistance pkg Driver's assistance pro pkg Remote Start Harmon Kardon Wireless charging Now if someone has a similar build and doesn't have it the mystery just deepens lol __________________ Current: 2020 M340xi Previous: 2016 340xi
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05-26-2020, 11:54 AM	#21
twin's Turbo New Member 2 Rep 8 Posts Drives: 2020 M340i & 2019 XC90 R Join Date: May 2020 Location: Ottawa, Canada iTrader: (0) Garage List 2020 M340i Xdrive [0.00]	I have the second battery under the hood also. M340i X-drive, with Premium Excellence Package.
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05-26-2020, 12:14 PM	#22
twin's Turbo New Member 2 Rep 8 Posts Drives: 2020 M340i & 2019 XC90 R Join Date: May 2020 Location: Ottawa, Canada iTrader: (0) Garage List 2020 M340i Xdrive [0.00]	There are two wiring layouts shown on TIS. One with Aux battery, Second battery is G6 and is referenced as Aux battery https://www.newtis.info/tisv2/a/en/g...tem/1Vndawcu6B one without. https://www.newtis.info/tisv2/a/en/g...tem/1VndlaDJfs
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