

There’s things you should keep safe, birth certificate, marriage license, car titles, etc.
Buy some sort of paper storage thing and keep everything safe there.
Ideally, it should be something that you can grab and bring with you in an emergency, but not something easy for someone to steal. Something like a fire safe that has a cable that can wrap around something secure, but relatively easy to unlock in case of disaster.

That’s great and all, but not all batteries need lithium. When another battery technology gets mature enough to surpass lithium based batteries, then we’ll still be stuck on old tech cause the government is subsiding it.
This also reduces the incentive for making more lithium efficient batteries.
Subsidies can help, but they need to be more generalized so they don’t create issues moving past current tech. Heck, look at how much trouble we’re having getting past oil, that’s a perfect example.