[sov]

> The problem isn't that we don't know how to make more powerful batteries right now, the problem is safety.

No, this isn't the problem. The problems are weight, volume, energy density and cost, and the fact that there's no single catch-all battery solution w.r.t. dis/charge rates, capacity, and the aforementioned values. Safety, while very important and somewhat costly (engineers time--mechanical and certificates), is something the big battery companies understand very well.

> The more powerful your battery, generally the more dangerous/flammable/explosive it is when it fail

There's a concept called single-cell isolation that basically obviates this.