PoE2
Overcharge
Support
Lightning
Requires: Level 1
Support Reqirements: +5 Dex
Supports any skill that Hits enemies, making its Shocks more effective but last for a shorter duration.
50% increased Effect of Shocks from Supported Skills
Supported Skills have 50% less Shock Duration on Enemies
Place into a Skill's Support Gem socket in the Skills menu to apply its effects to that Skill. You cannot have multiple copies of the same Support Gem socketed at the same time.
PoE1
Overcharge Support
Lightning
Support
Level: (1–20)
Cost & Reservation Multiplier: 120%
Requires: Level (18–70), (33–111) Int
Supports any skill that hits enemies.
Supported Skills have 50% chance to Shock
Supported Skills deal 25% less Damage
Supported Skills Shock Enemies as though dealing (500–690)% more Damage

Additional Effects From Quality:
Supported Skills have (0–20)% increased Shock Duration on Enemies
This is a Support Gem. It does not grant a bonus to your character, but to skills in sockets connected to it. Place into an item socket connected to a socket containing the Skill Gem you wish to augment. Right click to remove from a socket.