The problem is even though we have gotten miraculously stable lithium batteries, they still aren't 'bulletproof' enough that explosion and fire risks are negligible. Add 3x more energy to it and it starts becoming a really big problem. This is what has kept 99.9% of these miraculous battery technologies we always hear about, too dangerous to use in consumer devices.

If it is as stable, or preferably more stable, than current tech, great! If it is anything less, you will never see it except in maybe industrial applications.