- "In doing all I'd done, I must have burned off most of my personal Force reservoir. I couldn't use it to link myself to the Force, to refresh myself. I was alone and tired, not thinking particularly sharply, but I knew one thing: if I stayed where I was, I'd be found and found out."
- ―Corran Horn
The personal Force reservoir refers to how much a Force user could perform their Force powers before fatigue or other inabilities. The user's condition could be restored with rest and meditation. This amount of endurance was highly dependent on the user's experience. For example a Jedi Master could use their abilities more times than a Padawan, before fatigue.
Symptoms and concerns
Several Force powers had different demands in concentration and endurance than others, on behalf of the Force user. Continuous or excessive usage of the powers would have resulted in "Force fatigue" with several unwanted symptoms, both physical and mental. It is possible the number of Midi-clorains being possessed had an impact on the scale of one’s reservoir. However, even a being with formidable Force potential could find their Force Powers countered by someone more skilled, or even be defeated by someone with better tactics as when Darth Vader lost to Obi-Wan on Mustafar after failing to overcome him with a Force Push.
Count Dooku experienced some waning and waxing of his strength with the Force during the duel on the Invisible Hand. In this case, Dooku's over-reliance on the dark side led to "Force exhaustion," temporarily shutting down his natural Force senses. In several instances, this fatigue was suggested to have been heavily linked to Dooku's state of mind, with his strength being restored by a moment's introspection.
The excessive use of the battle meditation Force technique by Darth Caedus during the Second Battle of Fondor rendered him "thin-stretched" and unable to move or think clearly for a while, clearly demonstrating the limitations of Force usage. It was fairly likely that these limitations referred much to mental limitations and also the inability of the body to withstand continual use of external energies. By going into a state of Oneness, a Force User could temporally access and unleash an amount of power far beyond their normal limits, but this state was very hard to achieve and usually ravaged the body as too much Light or Dark energy killed the user's cells.
Behind the scenes
The concept of Force repository appears in Lucasarts games and is a game mechanic. By using Force powers, the pool wears out, and replenishes slowly with time/rest. Its role in games is to simulate the natural limitations (such as fatigue, concentration, experience) of a user, while its gameplay value is the same as the 'mana pool' of fantasy games; such measures prohibit the player using all of his powers every moment and therefore urges him/her to strategically choose the best time for each action rather than using them recklessly.
However the exact mechanism of these limitations is unknown and almost certainly not so mathematically precise as the 'Force mana' of the video games.
In the non-canon Soulcalibur IV, the three Star Wars characters' Force feature is called Force Meter.
- Star Wars: Knights of the Old Republic (As game mechanic)
- Star Wars: Knights of the Old Republic II: The Sith Lords (As game mechanic)
- Star Wars: The Old Republic (As game mechanic)
- Star Wars: Jedi Starfighter (As game mechanic)
- Star Wars: Episode III Revenge of the Sith novelization (Indirect mention only)
- Star Wars: Episode III Revenge of the Sith unabridged audiobook (Indirect mention only)
- Star Wars Episode III: Revenge of the Sith video game (As game mechanic)
- Star Wars: Battlefront II (As game mechanic)
- Soulcalibur IV (Non-canonical appearance) (As game mechanic)
- Star Wars: The Force Unleashed (As game mechanic)
- Star Wars: Empire at War (As game mechanic)
- Star Wars: Empire at War: Forces of Corruption (As game mechanic)
- Star Wars: Galactic Battlegrounds (As game mechanic)
- I, Jedi (First non–game mechanic mention)
- Super Star Wars: The Empire Strikes Back (As game mechanic) (First appearance)
- Super Star Wars: Return of the Jedi (As game mechanic)
- Star Wars: Jedi Knight: Dark Forces II (As game mechanic)
- Star Wars: Jedi Knight: Mysteries of the Sith (As game mechanic)
- Star Wars: Jedi Knight II: Jedi Outcast (As game mechanic)
- Star Wars: Jedi Knight: Jedi Academy (As game mechanic)
- The New Jedi Order: The Unifying Force (Indirect mention only)
- Dark Nest III: The Swarm War (Indirect mention only)
- Legacy of the Force: Revelation (Indirect mention only)
- Legacy of the Force: Invincible (Indirect mention only)
- Fate of the Jedi: Outcast (Indirect mention only)
- Fate of the Jedi: Outcast audiobook (Indirect mention only)
- Fate of the Jedi: Backlash (Indirect mention only)
- Fate of the Jedi: Ascension (Indirect mention only)
- Fate of the Jedi: Apocalypse (Indirect mention only)
- Jedi vs. Sith: The Essential Guide to the Force
- Star Wars Roleplaying Game Core Rulebook
- Ultimate Alien Anthology
- Power of the Jedi Sourcebook
- Star Wars Roleplaying Game Revised Core Rulebook
- The Dark Side Sourcebook
- Star Wars: The Roleplaying Game, Second Edition, Revised and Expanded