USB Power Delivery 240W: what Revision 3.1 changed (Japanese)
A Japanese technical reference on when 240W arrived, the added voltage levels, cable context, and the currently published PD specification.
Primary-source backed
Evidence-first knowledge & utilities
Heliacal Dawn is not a reverse-chronological blog. We start with real questions and decision problems, then publish the representation that best fits the job: technical references, comparisons, utilities, data, or other evidence-backed forms. The current substantive catalog begins with Japanese technical reference material.
Verified public assets: 3Advertising delivery: inactiveCanonical identity: independent of revenue state
Published now
The substantive catalog currently available is in Japanese. Each item keeps its own durable canonical URL and can gain other representations only when they provide real value.
USB PD SPR vs EPR: understanding 100W through 240W (Japanese)
A Japanese concept guide separating standard and extended power ranges and the voltage levels behind 100W, 140W, 180W, and 240W.
Primary-source backed
How to check a 240W USB-C cable: EPR, 5A, E-Marker and certification (Japanese)
A Japanese compatibility guide for separating power capability, electronic cable identification, certification, and data speed.
Primary-source backed
Not a blog taxonomy
A single intellectual asset may later support a web page, utility, dataset, feed, or platform-native representation. We do not publish empty shells for formats or channels that do not yet exist.
Evidence first
Prefer primary and official sources, and keep observation separate from inference.
Stable identity
Advertising, distribution, experiments, and presentation can change without redefining the asset's durable identity.
Format follows the job
Choose the form that best solves the user's problem instead of optimizing for article count.
Trust surface
Editorial methodology, privacy, terms, and contact policy remain independently inspectable. Advertising and future commercial relationships do not decide whether a factual claim is true or whether an information asset should exist.