Q: Concerning the battery, how easy is it to user-replace? I like good gadgets that last forever, and being able to replace the battery without shipping the unit back to CEntrance will be a bonus. A: It may be possible to replace the battery, but I see a couple of issues: 1) The battery is custom-made for CEntrance, so you may not be able to find an exact replacement. 2) The battery should last a long time, so you should not actually need to replace it. 3) The unit is packed very tightly inside, so it's possible to inadvertently break something if you don't know how to open it up. In summary, I think we would request that you sent the unit to us. Having said that, I don't think this would be a real issue. Q: I would be extremely interested in a true line out option on this letting me send the signal to my home amp and using the internal amp for my portable. A: We are struggling with this one. Turning the volume pot "off" is effectively what you are asking about. We don't think that this would be possible. However, the XLR outputs will feature low noise and distortion, so they should be perfectly fine for driving the home setup. The XLR outputs, even though designed to drive headphones, are as good driving line-level signal. The only issue is you may need to position the volume pot in the middle. We will have more info on that soon.