Ok thanks yeah i know my pro 668 charged while scanning no audio, just making sure the trx1 is the same i usually just prefer not removing the batteries often. How is the sensitivity and reception on the trx1 compared to the trx2.Yes but unless they changed the TRX-1 it only charges when not receiving a signal. I remember Don talking about that for the PRO668's and WS1080's. So the answer is yes but very slowly. I still charge my batteries with my MAHA 801D or my MAHA C9000 chargers.