Extreme retrogression of the Intenso Music Walker

Old model: new model:
- 8GB Memory internal - 8GB Memory externally, slower performance

- Battery life with one AAA battery
(Operating at several daily hours)
about 2 weeks - 10 hours

- Minutes display 4 digits - minute display 3 digits,
(From the 10 minutes it all back to 0: 00min)

- Play great audio files: easily - shows when switching device to format error.

- Super fast forward from 6.minute - throughout Go forward slightly.

Weaken menu with, but acceptable - menu poor, spongy, --- automatically jumps back to about 2-3 seconds

quite stable at vibrations - super sensitive device goes out quickly.

Easily one-off - depends on repeatedly, the only solution battery rausnehmen

Have multiple devices of the purchased new, and all the same Macke.
I do not know why so INTENSO performs a deterioration of a good MP3 player.
In general, the devices over time are better but in this case there was high a catastrophic regression.