Hi mbasko, Well I have completed my testing of the Avantree APTx Low LAatency Bluetooth adapters and I am sold, battery life is approx 10hrs and the lag is non existant. I love them so much that I bought a second pair and a 3.5mm audio splitter cable to teach my kids how to use the detector by listening to what they hear. I also took my partner out for the afternoon detecting together and she really enjoyed hearing what I heard and we shared the detector with no cables to worry about.
RGds
Mark