chrisn7 said:
I can understand why you want to change - I don't think I have ever come across and accessory that had a 12v 2 pin plug. I don't entirely agree with Prof though - the sockets are ok, but the plugs supplied with accessories are often low quality, with brittle earth connectors
Help Chrisn,
The intended purpose of the cigar type socket was for a cigar lighter that many cars had. As it was an established feature that allowed relatively easy access to the vehicles 12v supply it was adopted by the accessories market. Whilst the car manufacturers did use pretty substantial designs that were able to withstand the heat of the cigar lighter, many of the after market designs won't, and will start to deform and melt if a cigar lighter element is plugged into them..
The explosion of 12v car accessories has led to a dramatic rise in cheap after market sockets and as most plug in accessories use no more than a couple of amps their is usually no great problem for the sockets, but plug in some cheap (and from my experience not so cheap) plugs and quite often they don't make a reliable contact, and I hand noticed how warm some plugs feel when I have removed them.
Mechanically the design uses a spring loaded centre pin, and I have come across several accessories that jack them selves out of proper engagement in the socket. I have had at least four plugs wher running at less than the internal fuse rating where the spring that preloads the centre pin has got too hot and lost its spring pressure and melted the inside of the plug.
Fundamentally the cigar socket an plug was never designed as a power socket for accessories. From an engineering perspective it is an atrocious design for a power supply, and the plethora of cheap and definable interior components that have flooded the market have raised the prospect of poor electrical connections, leading to high resistance contact which in turn leads to heating, plastics will deform, and if cheap import has used the wrong plastic it could set on fire!
Whilst the sockets are generally more durable, you need to have durable and reliable plugs also. The system is only as goods as its weakest link, and as its nigh on impossible to predict the quality of the plug that's going to used it freduces the confidence of the connection to a very low level.
I will never recommend them as reliable power connectors.