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Re: Kona Electric Lifetime battery warranty vs leaf warranty.

Sun Mar 17, 2019 10:46 am

SageBrush wrote:
Leaf15 wrote: Lost capacity is a defect
Absolutely correct. Battery capacity degradation is normal wear and tear, and unless specifically warranted as in the LEAF's traction battery, any warranty on a battery is for workmanship defects. This well-settled in case law.
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Prior LEAF:
2014 LEAF SV
Ocean Blue
Delivery May 23 2014
50,000+ miles - all 12 bars - Same range as new - No warranty issues ever!

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Re: Kona Electric Lifetime battery warranty vs leaf warranty.

Mon Mar 18, 2019 6:44 am

Have to agree. Unless there is a specifically stated degradation level that triggers the warranty claim, I have to say the Kona has no degradation warranty at all. If anyone has stumbled across such a statement from Hyundai, please post it here because I have found nothing but a warranty covering pack failure.
2011 SL; 44,598 mi, 87% SOH. 2013 S; 44,840 mi, 91% SOH. 2016 S30; 29,413 mi, 99% SOH. 2018 S; 25,185 mi, SOH 92.23%. 2019 S Plus; 11,333.1 mi, 93.73% SOH
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Re: Kona Electric Lifetime battery warranty vs leaf warranty.

Mon Mar 18, 2019 8:02 am

Also, does Hyundai specify if a new or used pack would be used to replace a defective battery? Like Nissan, do they only guarantee a minimum percent capacity remaining on the replacement pack?
'19 Model 3 SR+ (own), '19 Leaf SV (leased), '12 Plug-in Prius (sold 3/19), '16 Leaf SV (prior lease), 11.43kW Solar PV (16MWh/yr real production), 20.5 SEER/13.0 HSPF ducted air-source heat pump, 3.70 UEF heat pump water heater, Induction Cooktop

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Re: Kona Electric Lifetime battery warranty vs leaf warranty.

Mon Mar 18, 2019 3:07 pm

I would try one more time for the most advanced members:
1. Battery capacity degradation caused by normal wear and tear - is not a defect and there is nothing to worry about as warranties for all EV cover those entirely and they simply would never have any warranty claim to deal with and none of us should worry about as it is small/slow and it is the best case scenario for any EV owner and EV manufacturer.
2. Battery capacity degradation caused by not normal wear and tear is a defect. This condition usually due to one or more battery cells, the battery comprised of, premature failure ergo it was caused by a defect in manufacturing of those few bad cells. Most of EV batteries cells are perfectly fine, just one or two can abruptly make battery only half or third capacity, specifically in batteries designed with prismatic cells. It is pretty easy to prove this fact as battery test would reveal those bad cells.
3. Some batteries are serviceable, like in Ionic. Good engineering means those cells or modules of cells with bad cells could be replaced very economically. For example Ionic has most of the HV battery components serviceable and anybody can buy any battery component: ... m=37371A13
It seems only few companies replace a whole battery, but better off, they need to replace engineers who designed those dumb, expensive liability monolith traps.
So no, Hyundai/Kia would never need to replace the whole battery. Hyundai/Kia would just repair your battery very economically.
4. Degradation is only one of the aspects to worry about, there is plenty of other bad things that could happen to the battery, burned heaters, relays, sensors, BMS controller and etc. Just tiny temp sensor failure would make BMS to disable the whole battery, without any regards to the remaining capacity. Would you rather change the sensor or replace a whole battery? Lifetime EV battery warranty to the original owner who keeps car(s) for long time is a great thing to have. The secondary owners would also benefit as they could repair the battery economically as well.

I guess most of the concerns on Leaf forum are originating from the past Leaf battery issues, but it does not mean it is universal to all EV batteries, their design and manufacturers.
Leaf 2015 SV CPO traded for 2019 Hyundai Ioniq EV Limited

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