Is There a Way to Control the Temperature of the Battery?

There is a bit of a problem here called chemistry. How long do you have to leave it so it's cool down enough to be able to take it in your pocket? It's essentially heat management, as we all know,. You can charge as fast as you like, but you've got to control the battery temperature. That's why really big battery packs that you're trying to charge at enormous speeds, like Teslas, for example, they have water cooling and heating. And there's been some news in the windows world this week, John. But yes, definitely one to have a look at.