Standard Energy Units (SEU) are a unit of measurement for power supplies. They measure the output of a Power Generator, and the capacity of power packs and batteries.
SEUs are generally stored in multi-capacitor, single-use (i.e. non-rechargeable) devices such as Powerclips, mini-powerclips and power discs, or in rechargeable active-matrix devices such as Power Beltpacks, Power Backpacks and Parabatteries.
The value of an SEU is generally standardized at 5 credits and often serves as a commodity in trade when electronic banking is not available.