<BLOCKQUOTE class="ip-ubbcode-quote"><div class="ip-ubbcode-quote-title">quote:</div><div class="ip-ubbcode-quote-content">Originally posted by Nick and Sonia:
This concerned us as our chassis battery has been losing its charge. In fact we are replacing it with a new battery tomorrow. </div></BLOCKQUOTE>I have decided that your average lead-acid battery lasts three to four years. This is based on my personal experience of dealing with them for many years. Coincidentally, most battery warranties are about three or four years
My experience is that when they fail, they fail without very little warning. Here today, gone tomorrow.
On all of our vehicles, I routinely replace the batteries after three, but never later than four years. Don't care about how they test. Out they go!
Don't have a clue why your outside entertainment center would turn on by itself. Only thing I can think of is that a power transient (spike or a momentary loss) is causing the logic to give it a power-on signal. Try a test - interrupt and restore power to the radio/TV/whatever very, very quickly and see what happens.
--John