Zealots are strong against units such as marauders, immortals, zerglings and hydralisks, and weak against hellions, colossi, roaches ,and banelings. Though they do a total of sixteen damage, their attack is treated as two attacks doing eight damage each. This allows zealots to do full damage against enemy immortals. Their charge ability is autocast by default, but this can be turned off.
Abilities
Charge
The zealot charges towards a target enemy unit or structure, boosting its speed to 8.47 for the duration. The zealot must have clear ground pathing to their target to reach it. Also increases the zealot's normal movement speed to 4.725