Actually wet battery also can kong without noticeable symptom. If Manlet problem is indeed the battery (one of my post earlier indicated harder crank start as one of major symptom of battery failure), the MF battery gave the same symptom as wet. Lots of wet battery also failed earlier. It really depends on luck. All my cars now running Panalite MF batteries and 1 lasted 3 years liao, still going strong (albeit I have a full set VS, GC and alternator direct PC Cable installed in that car tho)..

Only issue is whether the driver notice of the symptoms before total failure.