So I got to thinking. If a Jedi's abilities are measured by the amount of metachlorians (however you spell it) in thier blood, then should Darth Vader be less powerful?
Reason being, he lost a lot of blood in his fight with Obi-Wan, that and a few limbs. With that blood loss comes a decrease in the overall metachlorian count. So how is it that he is still really powerful?