If you are worried about ripping the power cord

“…Field Tested: JerkStopper – Macbook users have the MagSafe adapters, PC notebook users have… the Jerkstopper . If you are worried about ripping the power cord violently from your notebook, thus damaging your notebook’s power plug and possibly more, the Jerkstopper is the right product for you.

Each order comes with three plugs — one each for USB, modem and network ports. Installation is easy — put the plug into the desired port, slide the end part to the side, align the cable with the plugged in part and push the end part back. Very easy, takes less than a minute.

Once installed, the device does exactly what it’s supposed to do — it keeps your power cable in place. We tried to jerk it off, but it was impossible to do. ”

from Photography Gadgets