Why am I being downvoted? Currently available betavoltaic cells are rated for about ~20 years[0][1]. [0] https://newatlas.com/city-labs-nanotritium-betavoltaic

Why am I being downvoted? Currently available betavoltaic cells are rated for about ~20 years[0][1]. [0] https://newatlas.com/city-labs-nanotritium-betavoltaic-battery/23720/ https://newatlas.com/city-labs-nanotritium-betavoltaic-batte... [1] https://citylabs.net/products/ https://citylabs.net/products/