Just a note: weight is the enemy of anything with wings (fixed or rotary), and lithium ion are much lighter than those massive lead acid “aircraft” batteries. Of course that they are also more likely to overheat, whether in computers, cars, or aircraft, is still a “technical problem” to be worked out. Even a minor flaw in manufacture becomes an “oops” moment!
Just a note: weight is the enemy of anything with wings (fixed or rotary), and lithium ion are much lighter than those massive lead acid “aircraft” batteries. Of course that they are also more likely to overheat, whether in computers, cars, or aircraft, is still a “technical problem” to be worked out. Even a minor flaw in manufacture becomes an “oops” moment!