Recharging my Leatherfoot Raider Skullcap

[Castigate]

Its quicker if you drop your empty cap from your main along with something like a sapphire that approximately covers the cost to your charger, sell the charged cap, pick up the empty and the sapphire, sell both, buy back a charged cap, log back to your main and buyback his now charged cap.
But yeah make sure the vendor has room.