[notahacker]

Any sensible proposal for electric systems for commercial aircraft is going to aim for batteries to be safely swappable in 10-15 minutes. (Though they can still make delays from unexpected diversions to airports without a stock of batteries worse)

[jpm_sd]

The structural penalties for making "most of the weight of the aircraft" removable will probably lead to a plane that doesn't fly.

[greglindahl]

... for example, putting the batteries in the existing form-factor of removable cargo containers used in jumbo jets.

[JustSomeNobody]

Hmmm... I wonder. Let's say they design the aircraft around an existing battery (size/weight). If later technology allows for a lighter battery, would they they have to add the weight back in order to keep the cg correct?

[dx034]

And then charge overnight and be used as energy storage for the time they're not in use. As flight times are very predictable, they should be a good use case for battery storage.