Solid-state lithium ion batteries are the future. We should see these soon in automobiles. It will likely be many years before they are common place for devices, the liquid batteries being so cheap to produce. Solid-state batteries, which are smaller, lighter, hold a longer charge, and can fully charge in about 30 minutes, are more stable. They don't carry the same runaway fire risk.Grease enough palms to look the other way and almost anything goes. We’ve done a lot mitigate the threat at Brown but it’s too much money to leave on the table. Trying to get one lithium battery fire put out is tough. A container full of them will never go out before getting on the ground, or turning the plane into a very expensive boat.