[Zulu15]

Simple, the energy used to swing your combat knife and any other melee weapons is the same as the energy weapons because the energy weapons are linked to your body, so when you shoot that enchanced pulsar you actualy get tired every shot, this makes as a more efficient energy source since you dont have to carry any extra equipment and its nearly self suficient(on zone its fully suficient since you dont need to eat or sleep to restore energy =P), I make big post hurray n_n!