Mod a TomTom One GPS to charge via USB

Step 2 Defeating the Anti-Tamper security measures

The case is secured by 4 anti tamper screws on the back, these are standard 2mm Hex scews with a spike in the middle to prevent normal screwdriver bits or allen keys being used, however, as the spike is fairly thin it can be snapped off fairly easily. Using an automatic centre punch repeatedly "hammer" the spike from one side until it either snaps off or bends out of the way. You can then remove the screws using a 2mm hex screwdriver or allen key.