Intermittent failure to start.

GGoodsell wrote:
On three occasions the engine has failed to start due to what appears to be a dead battery.

When you chase things like this based on "what appears to be", you often run down the wrong path.

First, You NEED an inexpensive digital multi-meter.......to be sure what the condition of the battery IS.

Often when new vehicles sit on the dealers lot for a LONG time before they sell (all kinds of vehicles), the batteries are neglected and they go bad just sitting there. This is especially likely if it is a conventional wet cell type.