Change the battery without losing data

Replacing the Car battery is easy, but doing so without impacting on a modern car is not.
Many data can be lose, not only the GPS stereo etc but also in some cases, the electronic control unit can lose data, keys settings, etc. sometimes all parameters.

One solution is to connect a small lipo battery type three-element, the load is 12.4 v, to the going terminals themselves, before replacing it, with this system, the electrical installation does not lose the voltage at any time so that the change battery is no problem as seen in the video.

http://www.youtube.com/watch?v=dkYSSeLsf0s

You can buy a 9v battery with a cigar liter adapter for memory save, for 12.00.