Like all components of the CTEK system the cig socket charger is quality built with o-ring seals in the electrical portion to keep it dry and a firm grip on the socket.  That being said, there are some things to consider.Keep in mind not all cigarette lighter sockets on cars are live 24/7 - most imports tend to kill all outlets when the key is removed while american cars tend to leave the sockets live all the time.  This makes it difficult to use this with EVERY car without leaving the key in the ignition which can in many cases draw more power from the battery than the charger puts in, thus depleating the battery charge.  It's not a win-win scenario.One alternative is to install a second always on cigarette lighter jack for this plug.  If you are going that route I would suggest an alternative which works well with asian and german imports, again from ctek:CTEK 56-380 Comfort Indicator Panel- this is an alternative if your jack is not live without the key turned.  It occupies a blank spot on the dash and performs 2 functions - red/yellow/green blinking leds 24/7 to indicate the battery's state of charge and a ctek input jack to acccept any of their chargers where normally there would be a set of clips, rings, or the -263 cig socket.  Installed properly it looks like a factory install, provides an indication plainly visable, and a rubber covered location for inserting the ctek charger end.  If you can't use this 56-263 easy connect cig socket plug, then the 56-380 is the optimal solution which fits perfectly into a din switch array on imports.Both solutions get you the same result - you have an inside car convenient way to charge your battery from 117 VAC without opening the hood [or the trunk/rear seat/ all the oddball places some cars (ahem bimmer) put their batteries]Both methods are convenient, professional, well made, and part of a system that works well together to keep your car ready to start no matter what battery you use to start it.  The -380 version adds the battery state indicator wihch is a nice bonus at the end of the day to be able to glance at the dash with the key removed and determine the immediate charge status while the -263 (this item) can be used with most any vehicle even riding mowers!