[MainFrame65]

I think somebody is selling vaporware here. Identity microchips are widely available for pets and livestock, but they are the size of a grain of rice, require activation from an external transmitter no more than a couple of feet away from the animal, and transmit (more likely, actually absorb from transmitted energy) a short, fixed code over a distance of a foot or two. The idea that a GPS receiver (with storage) a cell phone type transmitter, and a power source sufficient to keep them operating for an extended period could be easily implanted is beyond current technology. GPS signals require integration, so power is required for several seconds to operate correctly.

An internal battery could only work for a limited time, although it could be recharged externally. But a modern GPS needs 4 AA alkaline batteries to operate for about 16 hours. My guess is something like 10 watt-hours. And the transmitter needs power, as well. External power would be required, perhaps through an inductive loop. There is no method currently available to obtain sufficient energy from the body to run the unit. And I don't believe it can be built small enough to not require major surgery for implantation.

[Jzen]

AHh don't worry about that, batteries that is. In the near future when a kid is born the doctor will ask what options you want with your new kid. Like an alarm system, mute feature, extra memory and rechargeable batters with an extension cord you can plug into the nearest outlet.