I was out on Monday, I hit a few trash targets, then my threshold disappeared (that's the trouble). I flipped the toggles, twisted the knobs, nothing would fix it. I turned it off and back on. My threshold came back momentarily then disappeared again. As I switched off, "Low Bat" would show on the display. I replaced batteries when I went out today and it worked, initially. I hit some trash targets, then a few minutes into it, my threshold disappeared again. I tried every adjustment (threshold, sensitivity, bands, disc & notch, tone, on & off) and nothing. The batteries were brand new out of the box I bought last week. Anyone know what's happening? del.