The most compelling feature of the MOMENTUM True Wireless 5 is not its Dolby Atmos support or Bluetooth 6.0 connectivity. It is a screwdriver. By engineering swappable batteries into both the earbuds and their charging case, Sennheiser repositions repairability as a marker of luxury rather than a concession to frugality. The form factor holds its own, arriving with IP54 protection and a silhouette trim enough to disappear into any pocket. But the boldest design choice here is philosophical. Longevity is being treated as a feature worth showcasing. The question that will define this product over time is not about specs or sound signature, but supply chains and aftermarket support. If replacement cells stay accessible and affordable years from now, Sennheiser will have done something the audio industry rarely manages. It will have made a product worth keeping.