I have the most powerful Linx 3D BTE. I use streaming a lot…especially at work. I use either the multimic or the Phone Clip to interface with my 2 way radio. ( Motorola HT1250 for those who are curious. Handset microphone/speaker with 3.5mm out for the multimic. Bluetooth adapter - Reline’s Bluelink M4 for the Phone Clip) My 13 size batteries last 4 days. There is no Linx line aid with 675 battery. I have asked my audiologist to get the Enzo 3D that takes the 675 battery. The mah rating of the 675 is 2 1/2 times that of the 13. I know there will be a size difference… so what. The Enzo 3D that has the 675 battery is the most powerful one. So I will not be pushing the aid at all… I had seen info that the bass response might be better when streaming music as well. I know that there is some possibility of circuit noise with the aid not being pushed at all.