A Yellow Cell is an ammunition type in Serious Sam Advance.
The Yellow Cell is a yellow energy cell used by the Uni-Directional Microwave Transmitter. Yellow Cells are never found on their own. They only appear in Backpacks, and even then only near the end of the last level, Caesar's Palace.
- Yellow cells are extremely rare. This requires to the player to make sure they really need to use the UMT before firing it.