The Elegance of Diatium
A lightsaber isn't a laser; it's a closed loop of contained plasma held in place by a magnetic field. The key to its battery life is Efficiency. When the blade is idle, the plasma loops back into the handle and recharges the cell. It consumes almost zero power. Power is only lost when the containment field is broken, i.e., when you hit something (an arm, a door, a Sith Lord).
The Colors
- Blue/Green (Guardian/Consular): Standard efficiency. Balanced for combat.
- Red (Synth-Crystal): Unstable. These blades crackle and arc, drawing 15-20% more power from the cell.
- Purple (Mace Windu): High-gain output. Cuts faster but drains quicker.
- White (Ahsoka): Purified crystals. Extremely stable.
"Qui-Gon's Door"
In *The Phantom Menace*, Qui-Gon Jinn melts a blast door. This is the single highest power-drain event seen in canon. A standard Diatium cell would deplete in minutes under that load.