The battery life on these is phenomenal. I've been using these headphones with theJabra Bluetooth Music Adapterand the headphones outlast the adapter every time, and we're talking about 8+ hours of constant use.I'm also using this headset along with my PC and my RazrV3m. The phone does not support Stereo Bluetooth Audio (A2DP) but it does support the regular headset profile that most, if not all Bluetooth enabled phones have. This means that the headphones work as a regular wireless headset for any Bluetooth enabled phone or Skype on your PC / Mac.On the PC, the headphones provide the mic input, the mono headset feature and the stereo headset feature. This means that I can be watching a video or listening to music in beautiful stereo sound and if a call comes though on Skype, it'll switch over to the microphone & mono headset profile for the VOIP conversation. The same is true for using the music adapter mentioned above and a mobile phone. When a call comes in, the music pauses / mutes (depending on the device) and you can answer the call by tapping the left ear piece. Tapping the right ear piece will pause / mute the music at any time.Sound quality is actually very impressive. If you're using these with your PC and the sound is coming through mudddy and crackly, it means that you're not using the Stereo (higher audio quality as well) profile. It's quite possible to listen to music using the Mono (used for mobile phone conversations) profile, but you're missing the great sound if you do.A great thing about the sound quality is that the range is quite wide. I hear certain things in music with these headphones that my iPod and Zune headphones just wont reproduce. The headphones are not earbuds (or earplugs as I call them) so you can actually still hear someone if they speak to you, that is you won't be completely oblivious.They came with a wall charger as well as a USB cable so that's very nice. The manual says not to use any other cables to charge the headphones, but close observation will reveal that it's just an ordinary USB-A to USB-Mini-B cable. (Probably what your digital camera uses.)