Energy

"Thanks to your nano-systems, you are not entirely organic. If an EMP weapon hits you, your bio energy reserves will be drained severely."

- description of EMP Damage Being machines, both the heavy machinery used in Mechanical Augmentation and the Nanites used in Nano Augmentation require a power source to function. Bio energy is the electrical energy that powers these devices. In Deus Ex and Deus Ex: Invisible War, the player has internal "batteries" that contain a limited reserve of bio energy, and both using Augmentations and being hit by EMP Weapons will drain this reserve. When the Energy Meter is empty, the player cannot use augmentations. The player's bio energy can only be replenished through the use of Power cells, but the Power Recirculator aug can conserve the amount of energy used.