Aura: minor transmutation; CL 1st; Price + 400 gp
This special ability can be applied to any item with a limited number of charges (but not single-use items). The item is equipped with a backup power source, not great enough to activate it with. When the item’s charges are expended, it does not lose its magical properties but is instead treated as having 0 charges. For most items this has no benefit unless its wielder has a way to activate an item without expending charges, such as the wandslinger’s Eternal Charge deed.
Construction Requirements: magic weapon, creator must have the item creation feat required for an item of that type.