I dropped a new battery in my 2000 Suzuki Intruder 800 early fall and always leave the bike hooked up to the battery tender when not in use. I went into the bike shed this past weekend and heard a faint, intermittent beeping sound. I located it to be coming from the battery area and it stopped and started up again when I disconnected and reconnected the tender. Never heard this beeping before. Any ideas what’s going on? I disconnected the tender before closing up the shed but would like to keep the battery charged over the winter.