The JerkStopper is a cable retention device designed to use your laptop RJ11 (modem), RJ45 (network) or USB ports as a restraint to keep your delicate AC power connector from breaking when there is pulling on the power cord. With a JerkStopper installed, the day-to-day tugging and jerking on your power cable will no longer cause damage to the power jack on your laptop. The JerkStopper is designed to minimise damage to the very weak AC power pin where your charging cable connects. It is a patented design keep you and others from causing costly damage to your laptop. Without a charger, a laptop computer is worthless and the repair costs of replacing your AC power pin are astronomical. For a relatively low expenditure, the JerkStopper is a versatile and inexpensive tool that could potentially save you hundreds in preventative damage.