Master Wand

Craft Wand (PH) , Spellcraft 15 ranks,

When you activate a wand, you can substitute a spell slot instead of using a charge. The spell slot must be one you have not used for the day, though you may lose a prepared spell to emulate a wand charge (you may not lose prepared spells from your school of specialty, if any). The spell slot lost must be equal to or higher in level than the spell stored in the wand, including any levelincreasing metamagic enhancements. For example, if lightning bolt is on your class list and you find a wand of lightning bolt with 3 charges, you can expend unused spell slots instead of charges, thus extending the life of the wand.

When you activate a wand, you can substitute a spell slot instead of using a charge. The spell slot must be one you have not used for the day, though you may lose a prepared spell to emulate a wand charge (you may not lose prepared spells from your school of specialty, if any). The spell slot lost must be equal to or higher in level than the spell stored in the wand, including any levelincreasing metamagic enhancements. For example, if lightning bolt is on your class list and you find a wand of lightning bolt with 3 charges, you can expend unused spell slots instead of charges, thus extending the life of the wand.

You can activate a wand without using a charge.