What does the Efficiency level VI symbol look like?

The Roman numeral VI in serif capitals inside a circle. It is also called “VI in a circle”, “efficiency level VI”, “energy efficiency level”, “level 6” and “level VI”.

Efficiency level VI symbol: the Roman numeral VI in serif capitals inside a circle

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Efficiency level VI

The Roman numeral VI in serif capitals inside a circle. · also called “VI in a circle”, “efficiency level VI”, “energy efficiency level”, “level 6”, “level VI”

What the Efficiency level VI symbol means

Power supply meets efficiency level VI

An efficiency grade for external and internal power supplies. Efficiency levels are a standard way of grading how efficiently power supplies work, counted in Roman numerals up to level VI, the most efficient. An adapter marked VI meets the highest of these levels.

Source · Manufacturer manual Medion robot vacuum cleaner operating instructions, symbols on the power adapter (German) · checked Nov 11, 2026

Where it appears

Chargers and power adapters

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Questions about the Efficiency level VI symbol

What does the Efficiency level VI symbol mean?: An efficiency grade for external and internal power supplies. Efficiency levels are a standard way of grading how efficiently power supplies work, counted in Roman numerals up to level VI, the most efficient. An adapter marked VI meets the highest of these levels.
What does the Efficiency level VI symbol look like?: The Roman numeral VI in serif capitals inside a circle. It is also called “VI in a circle”, “efficiency level VI”, “energy efficiency level”, “level 6” and “level VI”.

Checked against the source · Nov 11, 2026 · How we verify

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