The battery is up to 40% of a used EV's value. Assess real health before you buy, sell, or negotiate — for just $4.99, in 1 minute, no subscription.
The battery can be worth thousands of dollars
A few percentage points of degradation can mean hundreds to thousands of dollars less in car value.
Many used EVs exceed expected wear
Fast charging, heat, and miles accelerate degradation — not always visible at first glance.
Not all manufacturer data is reliable
SOH reported by the car can be optimistic. We cross multiple signals for an independent estimate.
Estimated health (SOH), battery grade, and real-world range for just $4.99. Resale risk and safe-purchase score are in the full report.
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Your assessment will appear here with estimated SOH, grade, and recommendations.
Make, model, year, and miles. Takes less than a minute.
Our model-calibrated engine estimates SOH from real degradation data.
See the grade, real range, and — with premium — resale impact.
We do not rely only on manufacturer-reported SOH — which can be optimistic. We use a hybrid model combining multiple signals for an independent estimate.
Reduce financial risk on every used EV and add a battery certificate to your listings. Talk to us about volume assessments.
Contact for B2BThe full report shows resale value at risk and how the battery compares to same model and age vehicles. It's concrete data to negotiate price.
We use a hybrid empirical model calibrated per vehicle, with public fleet degradation data (calendar + cycles + stress) and optionally your OBD/BMS reading. We do not rely only on manufacturer SOH, which can be optimistic. It is a robust estimate, but not a replacement for an official diagnostic.
Yes. It is your battery health proof — the factor that most influences used EV value. Use it to negotiate a purchase or give buyers confidence when selling.
No. The basic assessment costs $4.99 and can be paid directly without creating an account first. After payment the report is saved and accessible anytime.
Payments ($4.99 basic, $14.99 premium) are processed by Stripe and we do not store card data. One-time payment per report — no monthly fees or renewals.