Hi, I,m neil I,m new to the site, can someone help with imfo on sovereign battery. i have just bought an old THE SOVEREIGN detector, it does not have a battery, someone has modied the battery wires to take a single 9 volt fire alarm battery, as soon as i turn the machine on it makes a beep but not work at all, i,m thinking that there is not enough power with just a single 9 volt fire alarm battery to power up the machine propley, can someone please help ..thankyou kindly, neil..