Cyberboost Proenergy Packs are consumables in Deus Ex: Human Revolution. They contain multiple Cyberboost Proenergy Bars, which are an artificial food energy source, packed with proteins and carbohydrates.
When consumed, Cyberboost packs replenish two full energy cells, allowing Adam to use augmentations or perform takedowns. A single full cell can be recharged with Cyberboost Proenergy Bars, and three with Cyberboost Proenergy Jars. The pack stacks three deep, providing two energy cells worth of energy in two inventory squares (or an average of three energy cells per inventory square, compared with 5 for the bars, and less than 1 for the jar.)