The Coolant Cell is used in the Nuclear Reactor. This cell can cool the reactor, absorbing up to 10.000 heat units from Uranium Cells, while cooling itself down by 1 unit of heat/tick. When the "charge" on a Coolant Cell is low, leave it in a Nuclear Reactor or in a chest (Not tested) and it will regain the "charge" over a period of time. Stored heat can be drawn out by an Integrated Heat Disperser to prevent an overburdened cooling cell from melting.
It can also be used in:
- Overclocker upgrade
putting a water cell into a extractor creates you your own cooling cell