Silly question time again. A preview comment first, then the question(s) and/or discussion. Got the above mentioned A/C adapter/charger for my 668. I was told and believe that when the USB (to computer) cord included with the 668 was used to run/charge the scanner, that you could plug it in 'hot' but not unplug it while hot (hot meaning the computer turned on, or as in the newer motherboards that have a hot USB even with the computer turned off). My question is, with the A/C adapter being used, are pins 2 & 3 (the data pins) on the mini USB plug not connected, AND does this mean the charger can be plugged and unplugged while the 668 is turned on and receiving? I know the SD card can get corrupted if it is plugged into the computer (with the computer on, pins 2 & 3 tx'ing data), and you disconnect the mini cord while the scanner is on BUT can or does this same thing happen when using the 5v A/C adapter only. I tried to find a 'pinout' of the adapter, to see if it has anything on the 2 & 3 pins, but failed. Finally, will the 668 be able to 'switch' to A/C and batteries when hot plugging the adapter? In closing, the local RS salesman recommended this adapter BUT we know he would not cough up $ if the adapter fries the radio while using it.