Research grade Lithium-Air batteries already have energy density of 1,200 Wh/kg, which is 3x-4x greater than commercial grade battery storage. To match the effective or final stage energy density of Jet-A batteries need to get to ~6,000 Wh/kg. ๐งช๐๐กโ๏ธ๐จ๐ง๐ www.energy.gov/science/bes/...
A new rechargeable lithium-air battery potentially has four times greater energy density than a traditional lithium-ion battery.