Blaster power packs, also known as blaster cartridges or blaster ammo packs, were small energy-storage devices that powered portable blasters.
These power packs carried both a small electrical storage unit (such as a battery or other such device) and a quantity of compressed spin-sealed tibanna gas. Power packs for rifles (such as the E-11) typically carried enough tibanna and electricity for one hundred shots. Alternatively, plasma packs of the same size could power a blaster for up to five hundred shots, although with a slight decrease in the accuracy and cooling power of the weapon.