... The battery is a disaster! After about 6 hours of normal use the battery is completely empty with me, so less than 5% capacity! The same phenomenon I have found also on my Sony Walkman A845 MP, there holds the battery only approximately 9 hours. Why Sony only has to use such batteries into its devices such grottige, my old LG smartphone runs with the same usage over 30! Hours. Funny! About the technology of the X8; WLAN / Bluetooth reception is excellent, my router I receive even 200 meters! The music player sounds good, very good, he would with an equalizer that is missing just like the bit rate info on this device. A voice recorder I miss, as well as support various video formats! The integrated radio has high reception sensitivity, only the selectivity is a bit too wide with 180 KHz. Conclusion: For quick "check" on the Web this device is awesome, but listening to mp3 is the extended battery too weak. A PRETTY smartphone with little weaknesses ....