63 Nickel is not easy to come by and is super expensive.
https://www.ornl.gov/news/making-radioactive-63ni-target-explosives
Wow, everything he stated is true, and I am a believer.
I also agree this would be so expensive, that even when or if it is perfected, it could cost as much as a new car just to get one battery.
Yet, at one time in the 50’s a microwave oven costed more than a car, now everyone can afford them.
Sadly, I may be long dead before the technology reaches the point of the average Joe being able to utilize such batteries.
I also agree, that the biggest drawback would be convincing people that nickel Ni-63 is completely harmless. Yet the idea of using nuclear waste is cool, because then we have a way to properly dispose of it.