Oddly enough, the new cigarette lighter plugs no longer seem to fit the still-common cigarette lighter sockets. The diameter of this plug, and coincidentally, also of a plug my friend just bought for something else, is larger than the cigarette lighter sockets in my car and boat. This charger was for using my laptop while on the boat. When I discovered the plug didn't fit, I immediately went to the boating store for a new cigarette lighter socket; it seemed like an easy solution. However, the store had three models, and this plug didn't fit in any of them. Whether we're dealing with new standards here, I don't know. But in any case, the boating segment isn't ready for this yet, and replacing my car because the official Lenovo charger doesn't fit is a bit much.