Come to think of it I did leave the TX on all day Sunday, The batteries did run down into the yellow. Before I wrote eflite I took a set of freshly charged batteries and installed them in the TX. I have not checked the crystals though.

The lights on the 3-1 are both on, it's not the alternating pattern that happens when there is no signal.

Could I remove the crystals from the CX2 RX and TX and use them?