

China’s special for controlling a very high proportion of the processing infrastructure that converts the lithium ore to batteries, rather than the extraction. There are a bunch of places that have substantial known lithium reserves.
https://worldpopulationreview.com/country-rankings/lithium-reserves-by-country
| Country | Lithium Reserves 2024 (MT) |
|---|---|
| Chile | 9.3M |
| Australia | 7M |
| Argentina | 4M |
| China | 3M |
| United States | 1.8M |
| Canada | 1.2M |
| Zimbabwe | 480K |
| Brazil | 390K |
| Portugal | 60K |
| Namibia | 14K |
| Total | 27.2M |
Australia does the most extraction:
https://worldpopulationreview.com/country-rankings/lithium-production-by-country





















First, Peltier elements are pretty inefficient. Second, I’m dubious about the design — a Peltier element moves heat from Point A to Point B, and the whole device appears to still sit beneath the shirt. I suppose that the hot side is the outer side, but what you’d ideally want is to have hot air blowing as far away from you as possible.
I’m skeptical that it’s better to carry a battery-powered Peltier element than to carry something like an evaporative cooler. That’s more-energy-efficient, and you don’t have the problem of part of the device getting hot.