Akkubrief
A verifiable battery history for resale
Tesla Model 3 Long Range · 2021
Deep Blue · 19″
VIN 5YJ••••••••••MO01 · 87,204 km
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Battery history
Battery history building up
Observation period
18 months
Data basis
72 charging sessions
Current figure
93.1 %
± 1.4 percentage points
This document shows the observation period and the figures derived from it. The development is not assessed automatically at present.
Uncertainty of the estimate: ± 0.7 percentage points — that is the measurement on this vehicle alone. The figure above states ± 1.4 percentage points, because it also carries the uncertainty of the reference new-energy value.
Range on a WLTP basis
571 km ± 9 km
calculated, not a WLTP measurement
Usable energy
69.8 ± 0.5 kWh
Reference energy when new
75.0 kWh
variant resolved
Measured decline: -0.90 kWh per year · -0.59 kWh per 10,000 km · across 22,784 km of mileage span
Where the data comes from
WLTP figure when new 614 km, from EU vehicle registers for this specification
Simulated example of an analysis based on charging sessions (Q2) — not a measurement from a real vehicle.
Measured from 10 to 90% state of charge.
What limits the accuracy: The evaluable charge range has been used to 92% so far. Occasionally discharging further and charging back up narrows the figure.
An explanation of every figure on this document, matching its method version.
How this figure was calculated: 93.1% = 69.8 kWh measured usable energy ÷ 75.0 kWh reference energy when new.
Methodological details
Segment-wise curve, not leading here: 93.1% ± 1.9 percentage points.
What this document does not say
The Akkubrief documents the battery data stated here for the observation period given. No forecast of further ageing follows from it.
It makes no statement about mechanical condition, accident damage, corrosion, leaks or electrical safety.
It is an estimate with a stated uncertainty, based on vehicle data — not a laboratory measurement and not an expert opinion in the legal sense.
A valid signature covers only the signed data — not the file, and not the condition of the battery.
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