Using active biomods will deplete your bioenergy supply. Using Energy Cells restores bioenergy, allowing for continued use of active biomods.

To use an Energy Cell, press [ToggleInventoryMenu] to open your inventory screen.

Select the Energy cell by highlighting it with [Arrows] and then pressing [MenuSelect].

Press [MenuSelect] again to use the energy cell. Each Energy Cell will replenish your bioenergy supply.