Hi!

Thanks for pinpoint this out, we'll fix the doc. To respond your question:

Quote from http://liandri.beyondunreal.com/Armor#Unreal_Tournament_2003_and_2004 :

"
The shield system in UT2003 and UT2004 differs a lot from the UT armor system. The small and large shield charge are tracked separately, even though only the combined shield strength is displayed on the HUD. The Shield Pack only adds to the small shield stack, while the Super Shield Pack only adds to the large shield stack. The difference is, that the small shield stack is limited to 50 points, while the large shield stack can have up to 150 points. Both stacks can have a combined size of 150 points as well, so if the player has charge on the small shield stack, the large shield stack isn't used entirely. Also, by picking up the Small Shield, the small shield stack is filled and exceeding shield points are removed from the large stack.

Note: This is not quite how the shield system is actually implemented, but it's easier to explain and understand this way.

In UT2003, shield acts like additional health, absorbing any damage until all shield is used up.

In UT2004, only combined shield points exceeding 100 offer 100% absorption. Below that shield amount, the large stack absorbs 75% of the damage or as many damage points as there's charge left on the large shield stack. If the large shield stack is used up, the small shield stack absorbs 50% of the remaining damage or as many damage points as there's charge left on the small shield stack.

There's also the Booster adrenaline combo, which slowly converts adrenaline to health or shield at a rate of about 4 points per second. (Actually 5 points per 0.9 game seconds.) The booster combo adds its shield points to the large shield stack.
"

Best,
Michal