How to Test an EV Battery Range

Aug 13 2025

When buying a used electric vehicle (EV), one of the most important things to know is how far it can drive on a single charge — its real-world range. Over time, EV batteries naturally lose some of their capacity, meaning an older EV may not travel as far as it did when new. That’s why testing the battery’s health and range before you buy is essential.

An inspector inspecting a car

Why Range Testing Matters

The range of an electric vehicle depends almost entirely on the condition of its high-voltage battery. Even if the car looks perfect and drives well, a degraded battery can limit how far you can travel, affect resale value, and lead to expensive replacements.

Without a proper test, buyers often have to rely on dashboard estimates or seller claims — which may not tell the full story.

Methods to Check an EV’s Battery Range

  • On-board display: Most EVs show an estimated range, but this can be influenced by recent driving habits, weather, and charging patterns.
  • Test drive and range observation: Driving the vehicle for a set distance and monitoring battery use can give some insight, but it’s not a precise measurement of battery health.
  • Professional EV battery test: The most accurate way to determine true range potential is to measure the battery’s State of Health (SoH) with specialist diagnostic equipment.

The Most Accurate Way to Test EV Battery Range

RedBook Inspect offers Australia’s first mobile EV battery health test using the Aviloo Flash Test — the world’s leading independent EV battery diagnostic tool. The Aviloo test plugs into the car’s diagnostic port and runs advanced checks to measure the battery’s SoH, charge capacity, and performance under real conditions. The results provide a certified report showing how much usable capacity is left, giving you a reliable picture of the car’s actual range potential.

Convenient Mobile Service in Your Area

With RedBook Inspect, you don’t have to visit a workshop. Our mobile inspection team comes to you across Melbourne, Sydney, Brisbane, Adelaide, Perth, and major regional areas. You can book an EV pre-purchase inspection that includes safety checks, cosmetic and structural assessments, and the optional Aviloo Battery Test — all in one visit.

Why This Matters for EV Buyers

  • Know the true range before buying
  • Avoid unexpected battery replacement costs
  • Negotiate price with accurate, independent data
  • Buy with confidence from a dealer or private seller

Book Your EV Battery Test Today

Don’t leave your EV purchase to chance. A professional battery health test from RedBook Inspect is the smartest way to check an EV’s range before you buy. With over 15 years of industry experience and thousands of inspections completed, we deliver reports you can trust.

Get the full picture before you buy.
Book your EV pre-purchase inspection with Aviloo Battery Test today in Melbourne, Sydney, Brisbane, Perth, or Adelaide.

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