Testing Used EV Batteries: What You Need to Know

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Key Point: If you're considering purchasing a used electric vehicle (EV), one of the biggest concerns is the condition of the battery. The battery is a critical component as it holds much of the vehicle's resale value.

Article Reference:
  • We dive into a great article from Automotive News, a trade publication widely read by automotive industry executives, discussing the complexities of assessing battery life in used EVs.
  • The article highlights that even dealers face challenges in evaluating battery health, and buyers should be aware of these concerns.
Key Considerations When Buying a Used EV Battery:
  • Battery Life: This refers to how long the battery can power the vehicle. If the battery is near the end of its life, replacing it can cost tens of thousands of dollars.
  • Battery Range: This can be measured by testing the battery health. Range is a key factor in determining how far the EV can travel on a single charge.
  • Battery Longevity: Factors such as the age of the battery, its usage history, and environmental conditions (e.g., extreme temperatures) all impact how long it will last. However, predicting its future performance can be difficult.
Dealer Concerns:
  • Dealers often purchase used EVs from auctions or trade-ins and are cautious about the state of the battery. They generally assume the worst-case scenario, estimating a 50/50 chance that the battery might need replacement.
  • Dealers are also wary of the potential costs of battery replacement, as well as the risk of having to provide a warranty if the battery fails.
Buyer Tips:
  • When purchasing a used EV, it’s crucial to conduct a thorough check of the battery. Don't just rely on the dealer's word. Consider hiring a third-party, reputable EV inspection service to assess the battery's condition and estimate its remaining lifespan.
  • Be mindful of the way the vehicle has been used in the past. For instance, extreme charging or driving conditions might have accelerated battery wear.
Takeaway:
  • Evaluating the health of a used EV battery can be complex, and it’s essential for buyers to gather as much information as possible before making a purchase. Worst-case scenario planning with the dealer can help, but it’s always safer to have an unbiased third party perform the assessment.
 
Testing Used EV Batteries: What You Need to Know
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