This would basically be a primary source of energy for your weapons; they'd use this block first.  Once depleted, it would be inactive until fully charged. (Just like reloading the clip of a gun.)  Weapons would be debuffed if they use normal energy sources; less damage, less range, less of every variable stat; say deplete the total after upgrades of each stat by a straight 40% across the board.   Then, you have the benefits of using a SPECIFIC magazine.  You can have a magazine for fire am