Hi Guys, been a long time since I have been on the forums, need some assistance, a friend of mine has an Explorer 2 with a rechargeable battery, the battery will only charge to 11.5 volts and the detector will not power on after the battery is charged. So question is, would 11.5 volts be enough power for detector to turn on. It has been many years since I had an Explorer and the one I had was an XS, any assistance would be appreciated.