As the title says it looks like the Electrocutioner skill is not adding extra stun duration like the tooltip says it does.

Replication steps:

1. Spawn a stun baton from creative menu or craft a stun baton at workbench. Both methods of obtaining a baton were tested.
2. Use batons on a zombie until they get shocked, timing the stun duration and noting damage of each using the 0 number pad key while in dev mode.
3. Increase electrocutioner skill to 5/5.
4. Use both batons on a zombie until it gets shocked, timing the stun duration and noting damage.

Expected result: Stun duration and damage are both increased for each baton as perk description suggests.
Actual result: Neither stun duration nor damage is increased for either baton.