Battery OEM Nissan or OEM KIA

I'm at over 90k miles in a 2022 Kia EV6 and haven't had an ICCU issue. All I've done outside normal wear and tear like tires is upgraded to an AGM 12V battery to solve crappy OEM battery problems

My 2015 Leaf has 148k on it and still drives like new. The battery is down to about 85% but this is pretty old lithium tech with very early thermal controls on it.

My EV is 8 this year. I've not noticed a drop in range over that time, but I'll find out when it goes in for its last battery health check before the warranty expires.

When i changed my battery in my Kia eSoul (same car, different brand) the only thing that happened was that the aux bat SOC said 255 for some time. Then car calibrated itself to the new battery and said the right value.

I quick charged my Leaf over 350 times in 2 years and it barely degraded the battery.

San Antonio Leaf driver here, a Leaf is fine in Texas as long as you don't want to do road trips (battery heating gets to be an issue around 250 miles on a 40kWh on the interstate). This sub is overwhelmingly negative on the Leaf, despite it being a good local commuter.

I'm in central Texas and the Leaf does just fine for in city driving. The batteries run hotter than a liquid cooled battery does of course but they are capable of operating at Texas summer temperatures. Where they struggle is on long highway trips. High speeds mean more load on the battery which also means more heat and more likely to have the car limit power due to battery temps. I have noticed that Leafs in Texas do tend to show more battery degradation and less capacity than leafs that are in cooler climate.

We're having the same issue on our 22 Pathfinder. We're on our second battery. The first was replaced under warranty in January '24 after failing and stranding my wife out of town in the cold. It took 6 hours of testing before they would approve replacement.

they do suffer more with battery degredation due to crap thermal management (older models).

Our other car, the 2016 Leaf, kinda is the embodiment of all the negative talking points you hear about, since it's an older EV: It uses an outdated & slower charging standard, has a small battery, and has significant battery degradation (29%) since Nissan decided, in their infinite wisdom, to not give the Leaf a coolant loop for the batteries. (Heat is the biggest killer for EV batteries).