Site and standards
Editorial Policy
The rule is simple: a claim appears only if it can be traced to a source that supports it, and it disappears when the source no longer does.
One page, one finished task
A page is published when it answers a complete question with its own tool, its own explanation and its own sources. Near-duplicate pages built around word variations are not published; the existing page is improved instead. There are no country × device × trip-length page combinations.
Source grading
| Grade | Source type | May support | May not support |
|---|---|---|---|
| A | Manufacturer datasheets, standards bodies (e.g. IEC), regulators, government agencies | Voltage, frequency, plug type, battery energy, safety limits | — |
| B | Reputable technical press, retailer specification pages that reproduce the datasheet | Product existence, model numbers, port counts | Safety-critical conclusions on their own |
| C | Forums, community threads, user reports | Evidence that a question exists and is common | Any specification, voltage, plug or compatibility claim |
A community thread may tell us what to write about. It never tells us what is true about a device.
Date discipline
- Every data-backed page carries a review date and a next-review date.
- Country electricity data is reviewed at least every twelve months, and immediately when a standards body publishes a change.
- When two sources disagree and neither is clearly authoritative, the entry is marked as needing verification rather than silently picking one.
Language rules
- Estimates are labelled as estimates, with the assumption shown next to them.
- "Guaranteed compatible", "will not damage" and similar absolute assurances are not used.
- "Best" is not used to describe a product, and no ordinal ranking is implied by list order.
- Where an answer is a range, the range is shown rather than a single false-precision number.
Corrections
A calculation error is treated as a defect and fixes take priority over new content. A data correction requires a primary source; if one cannot be found, the claim is removed. Corrections are reported through the contact page.
Withdrawal
A page is taken down or reduced to an explanation when its data can no longer be verified, when a product it referenced has been recalled and no safe alternative is documented, or when a better source contradicts it. Leaving a wrong page online with a caveat is worse than removing it.
Separation of commerce and content
Commercial relationships cannot alter a formula, a qualification threshold or the order of a list. The full statement is in the affiliate disclosure.
Accessibility is part of the standard
Form labels stay visible, errors are announced next to the field and never rely on colour alone, results are reachable by keyboard, focus is visible, and every page's explanatory content remains readable with JavaScript disabled. A page that fails these checks is not finished.
Last reviewed 6 November 2026.