What point of battery capacity loss might qualify for Warranty replacement?

MGRMLN · 01-09-2023, 12:28 PM

I have my 2015 capacity sitting at 4.7 kwh.
Any help would be appreciated.

Minsoo

tommyb13662 · 01-09-2023, 05:43 PM

I heard from the dealership below 70%. However if one cell capacity or voltage is below the rest and causing the overall capacity to be low. They will replace one cell at a time. My 2016 with less than 35k miles had an issue and was completely replaced. Along with the battery safety module and the wire harness inside the battery module.

Nachbar · 02-07-2023, 07:25 AM

Quote:

Originally Posted by MGRMLN

I have my 2015 capacity sitting at 4.7 kwh.
Any help would be appreciated.

Minsoo

Mine is also 2015 at 4.9kwh and is now at the dealer for the capacity test. Will get results on Thursday.

Nachbar · 02-09-2023, 05:42 AM

Quote:

Originally Posted by Nachbar

Mine is also 2015 at 4.9kwh and is now at the dealer for the capacity test. Will get results on Thursday.

I just got the Information from the dealer. My i8 battery is at 84%

Tazzie · 02-09-2023, 06:15 AM

How can you do this test at home ? Thank you.

Nachbar · 02-09-2023, 07:12 AM

No the dealer has to run some tests. Cost me $350 (not if battery would have been under 70%).

Tazzie · 02-09-2023, 07:58 AM

Oh wow. Thank you. Probably worth having it done then sometime soon just to check.

Nachbar · 02-09-2023, 11:58 AM

Oh 87% 🥳
After nearly 8 years!

Frrrranz · 07-22-2024, 07:23 AM

i8 owner and new to the forum -- mine is a 1st gen 2018 and the 'secret menu' has its battery consistently 5.5-5.6 kwh. Probably helped by low mileage (10K miles) but says something on the good state of a 6 year old battery.

billy.gif · 07-25-2024, 07:53 AM

Quote:

Originally Posted by Nachbar

Oh 87% ��
After nearly 8 years!

When this test was done, my car was exactly 9 year old (production date 05 / 2014 - test run 06 / 2023). This is Scandinavia meaning rather easy climate versus Texas or Florida or such.

At least for the past 6 years my car has been regularly charged via "house hold" & public charging. Not with driving around with SPORT-mode. The SPORT-mode only charges up to 70% -> in a long term the battery will never be charged 100% or without one driving the vehicle while its charging -> the battery will degrade faster.

This is what a independent "HV-battery specialty shop" said to me. They're specialized in to change / repair faulty or worn out Tesla / Toyota / Porsche / VAG / BMW full EV & hybrid car batteries.

01-09-2023, 12:28 PM	#1
MGRMLN Private 7 Rep 94 Posts Drives: 2015 Nissan GT-R Black Edition Join Date: Nov 2009 Location: Atlanta, GA iTrader: (0)	What point of battery capacity loss might qualify for Warranty replacement? I have my 2015 capacity sitting at 4.7 kwh. Any help would be appreciated. Minsoo __________________ 2015 Protonic Blue BMW i8 Pure Impulse Edition 2019 Volcano Orange McLaren 570S Spider 2019 Carrara White Porsche Cayenne
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01-09-2023, 05:43 PM	#2
tommyb13662 Second Lieutenant 55 Rep 287 Posts Drives: 2009 135i Join Date: Jan 2016 Location: Philadelphia iTrader: (0)	I heard from the dealership below 70%. However if one cell capacity or voltage is below the rest and causing the overall capacity to be low. They will replace one cell at a time. My 2016 with less than 35k miles had an issue and was completely replaced. Along with the battery safety module and the wire harness inside the battery module.
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02-09-2023, 06:15 AM	#5
Tazzie Private 19 Rep 63 Posts Drives: BMW i8 Join Date: Jun 2019 Location: London iTrader: (0)	How can you do this test at home ? Thank you.
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02-09-2023, 07:12 AM	#6
Nachbar Captain 8187 Rep 679 Posts Drives: i8 Join Date: Jul 2015 Location: Switzerland iTrader: (0)	No the dealer has to run some tests. Cost me $350 (not if battery would have been under 70%).
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02-09-2023, 07:58 AM	#7
Tazzie Private 19 Rep 63 Posts Drives: BMW i8 Join Date: Jun 2019 Location: London iTrader: (0)	Oh wow. Thank you. Probably worth having it done then sometime soon just to check.
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02-09-2023, 11:58 AM	#8
Nachbar Captain 8187 Rep 679 Posts Drives: i8 Join Date: Jul 2015 Location: Switzerland iTrader: (0)	Oh 87% 🥳 After nearly 8 years! Attached Images
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07-22-2024, 07:23 AM	#9
Frrrranz Registered 2 Rep 3 Posts Drives: i8 Join Date: Jul 2024 Location: UK iTrader: (0)	i8 owner and new to the forum -- mine is a 1st gen 2018 and the 'secret menu' has its battery consistently 5.5-5.6 kwh. Probably helped by low mileage (10K miles) but says something on the good state of a 6 year old battery.
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