The XM5 spec sheet is unusually complete: 250 g, 30 / 40 hour music figures, 3.5 hour charge. Sony also publishes a quick-charge note (minutes of charge for hours of playback) on marketing pages, written as “up to,” which Sony already does.
We do not invent an isolation decibel score. If you need a lab plot, read a lab.
Shortlist reason: published endurance and weight, still a current Sony flagship as of this research date. Official shops discount it; the MSRP remains $399.99 on Sony’s U.S. pages.
