The manufacturing of all modern battery chemistries is dominated by Chinese companies because the Chinese government has strategically invested in production capacity and expertise for more than two decades.

But Chinese companies are running and building production facilities around the world. Leaving the production in Chinese hands is a political choice, not an inevitability.

Also, you can't take batteries away once you have delivered them to the customer. I have a 14kwh battery in my basement. It's built by BYD, a Chinese company. But once installed, I can pull the network cable and air gap it from the internet. Communication with my roof-mounted-solar and grid-tied electrical supply works without external network access, if I deem that an unacceptable risk. I could also do the work required to filter all network request from the battery management system at the router to make sure it can only contact servers from a whitelist, if I want to have access to diagnostics while I'm not at home.

These are all known, manageable risks that are completely within the capability of sovereign states to take care of. But there is literally no government (apparently) that can keep Trump and Netanyahu from fucking over the global fossil energy supply on a whim.