RedactedNarrative: On 08/25/18 at 16:34 hours, a single vessel property damage only boat accident occurred on Braidwood Lake at the north boat dock.  Vessel #1 operator unloaded his boat at the north boat launch/dock and secured it to the dock.   Vessel #1 operator boarded his vessel and attempted to start the outboard engine three times unsuccessfully.  Vessel #1 operator smelled something and looked back towards the stern noticing a little fire in the cranking battery location.  Vessel #1 operator proceeded to the front of the vessel and obtained a fire extinguisher.  Vessel #1 operator unsuccessfully attempted to extinguish the fire because in had grown.  Vessel #1 operator exited the boat and called 911.  Vessel #1 suffered extreme fire damage and is a total loss.