I have been using the stock re-chargeable battery on my Etrac for the last two months with no problems. This battery was brand new in March of this year. Yesterday when I powered the Etrac up, I got a warning saying the voltage was too high and the detector would not power on. I turned it on and off four or five times and it eventually turned on and operated perfectly. I came home and put it on the charger overnight and checked the voltage with my tester. It read 11.95 volts. Any ideas to what might have happened. My worst nightmare is having to send it in and being told it can't be fixed.