OwnSafe 2pP v1.3 - Magnetic Power Connector
This is my take on building a magnetic connector (a la Magsafe) for any device. This can handle a few amps - I've been using two of these with 3~4A@19V for a couple of months now without the slightest heating or any other problem. It is protected from being connected the wrong way around by magnetic polarity and from short-circuit by mechanical protrusion. If you need any further help or have any suggestions, feel free to contact me!
That being said: reproduction and use is entirely at your own risk, I do not take any responsibility for injury or damage whatsoever.