How to choose a gps tracker for tool rental?

Question

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The bottom line is, the thieves got all the tool rentals in the city. Thinking about how to be safe. We plan to sew them into tools and equipment. We need a small-sized, autonomous (which we can not charge for a long time), a gps tracker that goes into hibernation, more or less accurate, sending its coordinates once or twice a day. No microphones, nothing more is needed. Advise plz.
Well, how more profitable to buy, if you take 40 pieces for example. You can diy or whatever)
ATP in advance!

Answer 1

Of course, I understand that it will sound like nonsense, but look towards trackers for pets (cats, dogs, etc.). Of the pluses - most models are waterproof, there is a battery and so on. Well, in China you can order at cheap prices - search on aliexpress / dx for "pet gps" / "animal gps"

Answer 2

For such purposes, it is necessary to use the most protected GPS trackers, with a wide range of operating temperatures, so that they can be fastened to different types of equipment.
As an option
For monitoring, as an option, you can use the free monitoring service GPS Trace