Editorial policy

Sources

Every numerical value on this site links to a primary source: a manufacturer datasheet, the issuing body of a standard, a government notice, or a peer-reviewed paper. Where sources disagree we show the range and say why (usually different test temperatures or methods).

Checking

We draft with help from software tools, including AI writing assistants. A human editor checks every figure against its source before publication. Nothing is published that the editor has not verified.

Neutrality

• Rankings and comparisons are never sold. A supplier cannot pay to appear, to move up, or to be described more favourably in editorial content.
• Sponsored content is labelled "Sponsored" at the top of the page and is kept apart from editorial pages.
• Suppliers may send datasheets and corrections; we apply the same checking rules to them as to anything else.

Updates and corrections

Each page shows the date it was last updated. Standards pages are reviewed at least every three months. Factual corrections are noted at the end of the page with the date.