Stunstick

The Stunstick is a common melee weapon used primarily by Civil Protection in the first chapter of Half-Life 2. Rarely seen in any other instances, but the player is unable to pick it up or use it, but it is usable in Half Life 2: Deathmatch and Garry's_Mod.

In regards to Half Life 2, Civil Protection officers often use the baton, for citizens who have failed to comply to rules and regulations, for beating.

In Half Life 2 Deathmatch, the stun baton is added in as an extra weapon for the combine team. Interestingly, while the player can't use the baton, it can be picked up and used as a battery, recharging his HEV Suit's power by 15 percent. This suggests that the stun rod contains a standard Combine battery or capacitor with a standard Combine energy outlet.