A dealer's battery check on a nearly 200,000-mile electric vehicle turned into a one-point cliffhanger, and a reminder that for used EV shoppers, battery health can have a huge impact on resale value.
In this case, that narrow difference could determine whether the owner receives an $8,000 trade-in offer at all.
Here's what to know
In a Sept. 26 video shared by car dealer Alex (@evautoalex) on TikTok, the focus was a 2018 EV with about 197,000 miles.
@evautoalex 200,000 miles put the battery to test... Battery health can either make or break it! The warranty decision changes everything. #valuation #batterytest #carwarranty #highmileage #ev ♬ original sound - EV Auto Alex
Before giving it a value, the dealer said the battery needed testing, and the report came back at 79. That figure was just under the 80 score the warranty company requires to cover the battery.
Alex added that he had emailed the warranty representative because "he will sometimes do it" when a score comes in that close.
"If [they] won't do it, then I don't want the car, because I can't," the dealer added. "It's totally out of warranty, and I can't sell a warranty to somebody, and that's just not something I'm comfortable doing."
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The video also showed that 17% of the car's charging came from fast charging, while 83% came from slow charging.
Commenters saw the result differently than the warranty cutoff did.
"Even 79% battery life at 200k miles is impressive," one wrote.
While Alex's stance made sense, that would not have stopped many viewers in the comments from buying it.
"I would pay 8k for that car instantly at 79% battery life," another offered.
More background
The dealer said at the start, "I'm having a hard time valuing it with all those miles."
Even with nearly 200,000 miles, the vehicle still appeared to have a possible $8,000 trade-in value, showing how much a battery report can affect an EV's resale outlook. That number, however, depended on whether the warranty company would make an exception.
The post also touched on a common concern about fast charging. One commenter wrote, "Another reason [why] I don't want an ev as I don't own a house [and] I'd have to fast charge." But the vehicle in the video had high mileage, a mostly slow-charging history, and still retained 79% battery health.
That result pointed to another option for the owner.
A user wrote: "$8000? Just keep it. Still a great car."
What can be done?
For shoppers considering a used EV, ask for a battery health report before buying or trading. A diagnostic like one that breaks performance down "all the way down to the individual cell of the battery," as Alex described it, can give a clearer picture than mileage alone.
It also helps to ask about charging history, especially if a seller has access to records showing how often the car was fast-charged versus slow-charged.
Buyers should also check whether any battery coverage remains, and whether a warranty is available. Being one point above or below a company's threshold could mean the difference between a straightforward sale and a rejected trade-in.
Keeping charging records, getting periodic battery diagnostics, and understanding warranty requirements can help protect resale value and avoid surprises when it is time to sell.
Where can I learn more?
Battery health can make or break a used EV deal, as this appraisal showed. How long EV batteries last, how quickly they lose range, and how ownership costs compare with gas cars are thus critical factors.
• Tesla's own data shows battery degradation over time is slower than many buyers expect.
• Across recent model years, EVs have kept up to 95% of range after five years.
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