While riding into darkness with a Nite Rider MiNewt 600 Cordless, I noticed that after the light was activated, I lost the signal to my heart monitor (Sigma PC 3) and computer (Shimano Flightdeck). Not all that concerned about the heart monitor since I wouldn't be able to see it in the dark, but I don't like losing the accumulated mileage on the computer. The computer signal was erratic but mostly not registering as I tried lower out settings. After about 4-5 miles, the computer started recording again, but only on the high setting. The batteries are still strong enough during unlighted operation but could be due for replacement in both (transmitters) devices. Would a stronger signal help? Any constructive thoughts/suggestions please???