I haven't any knowledge about the "charging" being a necessary component to the GPS tracking chips that are available to be easily placed under the skin of pets by vets.. I do know that there are available two different micro data chips for pets.. yes, one of them is the basic info like owners contact info, home vet, up to date shot record.. its a ONE TIME FEE OF $50 + possibly charges to have it implanted under your pets skin and that's it.. these "card readers" that are used to scan EVERY ANIMAL that comes in the door of the vet, shelter, etc are VERY VERY WIDELY ACCESSIBLE AND USED IN MOST OFFICES AND SHELTERS.. the scanning of each animal is now just standard operating procedure.. if the animal does in fact have a chip it is read and the important info is logged and used appropriately(ex. such as returning a lost or stolen pet to its rightful owner) ..
And then there is the second type of micro chip that is also available to be implanted under the skin of your pet by a vet.. it is an actual GPS tracking chip and instead of trying to describe what all it does IMO its easiest just to state that its capabilities mirror those of the GPS tracking chip that ALL SMARTPHONES ARE NOW EQUIPPED WITH IN THIS DAY&TIME..its literally as simple as that.. you can log on from any internet via home computer, laptop, cell phone and log into the GPS tracking site with your pets personal micro chip code and voila~ just like on Google maps it will pinpoint the exact location of your pet.. ANY WHERE IN THIS ENTIRE WORLD..
but this micro chip with its full GPS tracking capabilities is MUCH MUCH MORE EXPENSIVE than the other basic info chip.. not only is the cost of the actual GPS micro chip a helluva lot MORE expensive.. but just as is any other item that is to be GPS tracked IT COSTS A MONTHLY PREMIUM USUALLY AROUND $50 PER MONTH!
SO yep the technology is definitely here and available for use but at this point the cost for such methods is on the high end.. moo but as with all technology as the companies continue to one up and out do the others the prices will eventually drop Considerably lower and we'll see it become more and more of a common occurrence for our pets to have these type micro chips and GPS tracking and monitoring.. jmo, tho..
As for the charging.. I'm still stumped on that being necessary.. ?? I can say that those I spoke with while looking in to getting our dog "chipped" that none of them ever mentioned anything about there being a charging component necessary regarding the GPS chip and tracking.. so idk?
HTH