I was on the Gardener of Men quest in Skyrim when I realized that my enchanted two-handed weapons' charge was depleting faster. I wasn't using it anymore than usual when you regularly use an enchanted item. I enchanted both weapons (one a Dwarven warhammer, enchanted with lifesteal, taking 7 points with each hit, the other a Dark Seducer warhammer, enchanted with soultrap). Both were renamed. Anyone know why this happened?