Maybe newer E5s have a flashing red light when done charging? Mine doesn't though like the others have posted. As long as it's working... sounds fine to me. But for peace of mind you should email FiiO.
Regarding the sound quality... are you using an LOD? I'm guessing not since you are using a Fuze? My experience with the E5 has been that if you don't use an LOD, the sound quality is a lot worse than out of the headphone amp. Too much hiss.
If you use an LOD these problems magically disappear.
Ugh, this was my first experience with Fiio...not a good start...
The amp "works," I don't know if anything is actually wrong, though I'm not really impressed with the results. To be honest though, I had less hiss straight out of my Sansa Fuze then out of the E5, and the volume of the Fuze was generally louder than the amp, even with the volume turned up. So, I supposed it doesn't actually work, but music plays through it. I feel like the music is slightly more lively, but not by much. I wasn't expecting much out of a $20 amp, but I assumed it wouldn't make the sound worse...
I think I'll just return this...I was looking to try the Fiio E7, but I don't know if I should go with Fiio again. Maybe just bad luck, but still...Perhaps I'll save up for a D2 Boa...
