hi Andy i have just had power fail on 12volt I thought that the battery was dead (old age) but this was not the problem. I traced it back to the charger and after seeing reports of it failing thought it was this! but after checking it was down to the thick white/orange wire from the plug, the connection has a thick wire that does not fit the connector very well and had come loose may be a check to see that others wont suffer the same ? could this cause the charger to fail ? cheers Andy keep up the good work k.