> Most manufacturers offer a warranty somewhere in the range of 8 to 10 years, and 100,000 miles. That usually means that if your battery is below 70% health within either 8 years or 100,000 miles, they’ll replace it for you.

This disagrees with pretty much every other source I've been able to find. An N year/M mile warranty is good until whichever of N years or M miles you hit first.

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rconti 3 days ago | parent | next [-]

The quote you reference doesn't make a distinction either way.

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tzs 3 days ago | parent | next [-]

Doesn't it? It says:

> That usually means that if your battery is below 70% health within either 8 years or 100,000 miles, they’ll replace it for you.

Consider a car with 200k miles at 5 years. 5 years is within 8 years, so I don't see any way of reading "within either 8 years or 100k miles" that would not make that car covered. Similar for a car that is 15 years old with 50k miles.

But everything I've seen elsewhere says the warranty applies as long as you are within 8 years and within 100k miles.

	▲	rconti 3 days ago \| parent [-]
		Sorry, I was parsing the "either" incorrectly here.

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gerdesj 3 days ago | parent | prev [-]

Well played Sir.

My MG4 (Saic) has a five year warranty and rather a lot of small print, that I should probably OCR and pass through Chat for a summary and then read myself.

I do know it will last longer than my last car - a Ford Focus with an Eco boost abomination of an engine. The engine oil warning gauge thing decided to only kick in at just above the bottom level on the dipstick. Even so all should have been fine. I even drained and replaced the lot. This was a three year old car. It degraded over about a month and eventually passed away in Bristol. I live in Yeovil, a good hour away.

My first car was an elderly Mk1 Ford Fiesta (it was old in 1994). That often managed to run without any oil for some time because it had ended up as a rusty stain with the contents of the radiator on the underside of the bonnet (hood) and on the road.

	▲	3 days ago \| parent [-]
		[deleted]

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tonymet 3 days ago | parent | prev [-]

I agree. and besides, that warranty is way too short. after 8 years, the car is unsellable with a 60% battery. And the used market is trending that way

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foobazgt 3 days ago | parent [-]

It's stated directly in the article that Tesla's study reports vehicles with 200K miles generally retaining 85% capacity. That's nearly 300% better than what you're suggesting.

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tonymet 3 days ago | parent [-]

first off that's not the case just check everyone running their battery calibration tests on forums.

And the context above is the warranty not covering long enough durations. 70% or 8 years does not protect the value of the vehicle. Below 70% @ 9 years is a worthless car

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foobazgt 3 days ago | parent | next [-]

> first off that's not the case

It's objectively the case. They literally have the data to back it up, regardless of what anecdata you might have seen on some forums.

> And the context above

Their fleet data says 85% battery average capacity at 200K mi and that battery degradation slows down over time. That's a far cry from 70% at 9 years.

	▲	tonymet 3 days ago \| parent \| next [-]
		Not to mention what’s the stddev ? That’s still a lot of write offs even going by their subjective figures
	▲	tonymet 3 days ago \| parent \| prev [-]
		That’s the opposite of objective.

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Sohcahtoa82 2 days ago | parent | prev [-]

> first off that's not the case just check everyone running their battery calibration tests on forums.

Relying on posts from forums is going to end up with some major selection bias. People who don't have significant battery degradation are less likely to go to forums to see what others have been dealing with.

	▲	tonymet 2 days ago \| parent [-]
		i agree partially. I think both outliers will post. the good ones for bragging rights. But don't be too quick to dismiss. there's an entire industry in tesla battery repair to address the loss in value. That wouldn't exist if the batteries were at the claimed level. and there are many other indications. It's funny how "statistics" from tesla will be taken at face value, whereas other real experiences from owners are dismissed as "anecdotal". They are all just stories. Who do you want to listen to?