Can you activate charges of Warlock’s Scepter and Gloves of Eldritch Mixture in same round?

Warlock’s scepter mentions:

… a warlock (or any other character capable of invoking an eldritch blast) can choose to spend charges from the scepter to increase the amount of damage his eldritch blast deals.

And Gloves of Eldritch Admixture:

Spending 1 or more charges adds extra damage to the next eldritch blast you make before the end of your turn.

Given they are both swift action to activate, can warlock activate both items in same round and boost its eldritch blast?