Crank: High Voltage, Chev Chelios' External Heart Battery Pack (silver, working)

original movie prop

This is one of the three silver-style artificial heart batteries made for Jason Statham's character Chev Chelios. This is the style he gets from the ambulance and includes a Velcro belt. It's a functional 'battery' in that it has several LEDs installed that can be turned on in any combination by a series of switches on the back of the unit. This seems to be the only one of this style that was not used in the scene where he is pulled behind a boat (and as such, this one has no water damage like the other two I have). This one also has the little wire that connects to the medical electrode, and came with a bunch of unused electrodes. (I assume the used ones were thrown away.) The case is made from a portable USB Hard Drive case that's been gutted and has the LEDs installed (which you can see in the third picture). Runs on two button-cell type batteries.
Here's a couple of screen shots showing the battery being given to him in the ambulance, and later during a fight scene.