Yep --- the above is all true -- mine as well, has all kinds of monitors, boards for your water heater, furnace, control panels, etc./etc./ -- use a battery tender and get some sleep, don't worry -- use one on the motorcycle as well !
Bill
PS -- make sure your batteries are good..and check your battery voltage output before you hook up tender -- you will usually see full green charge light in short time and will stay that way --- otherwise, my batteries die in a few days