G'day all SDC2300 owners, I experienced the same problem out one day in the bush , broke a bit go green twig and shoved it in-between the batteries problem fixed but the problem arose 2 years into operation the sec intermittently so figure that one out I remembered the post about the positive battery terminals being different in size all good now, retuned my sdc to mine lab to check a speaker type issue which also appeared to be intermittent