NW-S313

The NW-S313 is a thirteenth-generation S Series Network Walkman with 4 GB storage supporting MP3, WMA, AAC, and WAV playback. A lithium-ion battery supplied up to 77 hours of use with photo playback and Clear Phase.

The modern S line shifted closer to the old E Series role and simplicity, dropping video playback. The S313 is part of the very late simplified S phase, where the line had effectively become one of Sony's last modest, low-friction, compact Walkman branches. Sony was no longer trying to keep every old branch alive in its previous form. It was consolidating.