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Energy

A car can show range and still refuse to wake

The figure on the display is the traction battery. The small battery that starts the computers is a different one.

Tomas Rehn, Road Test Editor · 6 October 2026

The number on the display is the traction battery. It is the pack that moves the car. It is not, on the cars we have been in, the small battery that wakes the screens, the locks, and the computers that have to agree before anything moves. A car can show a long range and still sit there, dark, because that smaller battery is flat.

Two batteries, two jobs

This is easy to mix up, because the car talks about one figure and people hear "the battery". The desk has started saying both. If the car will not wake, the first question is the small battery, not the range that was on the display the night before. A lead that jumps that small battery is a different tool from a cable that fills the traction pack. Putting them in the same sentence is how a stranded car gets the wrong help.

We are not naming a model, and we are not turning one quiet morning into a recall. The split is ordinary. It is also the split a driver needs at the moment the cabin stays asleep.

What the note will say

When we write about energy, range means the traction pack. A car that will not power up gets a separate line for the small battery. Those are not two ways of saying the same fault. They ask for different tools, and a display full of kilometres is not evidence that the car is ready to leave.

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