Thanks, I tried that and didn't work, but I did plug the transmitter into my spider V240, and it kickstarted the led's, so when I put it back into the base, it decided to charge. (at least i think so, charged overnight but it still flashes green slowly) I checked the version numbers base is 1.01, transmitter is 1.05. My old transmitter was upgraded to 1.06, I'll have to compare them to see how they perform.