The Panasonic D-Snap SV-SD850N is supposed to give you 80 hours of playtime on a single battery charge. That is quite impressive.
On a quick 3 min. charge the SV-SD850N gives you 3.5 hours of playback time.

Panasonic also integrated a noise canceling feature into the SV-SD850N.

The display featured in this DAP has 4 lines and is OLED based. Other features of the SV-SD850N include FM world tuner (Japan, USA and Europe), MP3, WMA, WAV audio file support and accepts up to 4GB size SD cards.
Measurements are 35.0 (W) ×91.3 (H) ×12.3(D) mm