By the way, I was reading the topic on types of batteries, we have 4 AGM 12V for our house batteries and they are at least 5-6 years old and are charged by a 12v alternator on the motor, no problems, still working fine.A little off topic but, I work about a mile from the school in Newtown CT, this time of year I can see it from my office window......please keep us all in your thoughts and prayers,