50% of the energy density of a setup using compressed hydrogen. Large passenger aircraft are more likely to use liquid hydrogen if hydrogen does indeed become the fuel of choice. LH2 aircraft could actually exceed the performance of fossil fuelled aircraft, let alone battery electric.
Batteries also leak energy, and no, hydrogen isn't a potent greenhouse gas.
We really need to think twice before investing like crazy and reaching the point of no return on a technology that could bring the threat that it was meant to let us escape from...
At least with batteries we do not have this risk of GHG leaks.
this is not the same at all, batteries do not leak anything outside of themselves, the "leak" you're speaking about is the battery consuming slowly its own chemical potential energy. They do not emit anything physical.
Batteries also leak energy, and no, hydrogen isn't a potent greenhouse gas.