NW-S23

The NW-S23 offers 256MB storage in the second-generation S Series sports Walkman family. It played MP3 and ATRAC3plus files through a 1-line monochrome OLED display and lasted up to 83 hours on one AAA battery. It provides higher capacity within the sport-focused branch derived from the E70/E90 era.

The higher-capacity sibling to the NW-S21 with a fairly clear historical role. It is not trying to be the most advanced or most feature-rich flash Walkman. It belonged to the branch that kept things direct, lightweight, and battery-focused while the rest of the lineup became more layered. It is the more practical upper tier of the early second-generation S Series, before that family's identity became much less straightforward.