This nuclear battery could power your smartphone forever - as long as you don't value your life or sperm count too highly - ExtremeTech
Prototype Nuclear Battery Packs 10 Times More Power | SelectScience
A novel betavoltaic technology with dyes for better energy production
Investigation of nickel‐63 radioisotope‐powered GaN betavoltaic nuclear battery - Aydin - 2019 - International Journal of Energy Research - Wiley Online Library