Power charge
Some skills grant charges. Each charge lasts a short duration before it disappears. Gaining a charge resets the duration of all accumulated charges.
Power Charges are related to the intelligence attribute and grant +50% critical strike chance per charge.
By default characters can have a maximum number of 3 active charges of each type at one time. This maximum can be increased by certain passive skills.
Currently only Power Siphon gives Power Charges, and the only skill which uses them is Discharge.