You may use Charisma in place of any skill on any check to recharge an armor, item, or weapon with the Magic trait
From how I read it. Sounds like regardless rather it normally is rechargeable or not as long as it's has magic trait. That she could roll and recharge it. Which would be an excellent ability. Trade off being depending what is you won't make your check... but it doesn't say that that you have to win the check.
That's my thought.
Good luck.