Protactium Cell

The Protactium cell, similarly to the Thorium Cell, distributes it's heat over an area instead of just the 4 cardinal directions.

Without upgrades, the cell will produce 7.2 quadrillion heat in it's lifetime, for a total profit of 2.16 quadrillion.


 * The research calls the cells Protactonium, while the cells themselves are Protactium.