If his battery and his battery pack are both dead, he's going to wind up as more of a target since he won't be able to move or fly out of the way fast enough and they decide they need some sort of conductor to function.

[He sees the ofuda strip in her hand and he perks up slightly.] We were talking about finding her and asking for advice and ofuda. This is fantastic! [And hopefully enough to protect them for a bit.] I'll have to thank her when I find her. [He's slipping the ofuda into his pocket for now, still glancing over each shoulder to ensure they're alone. However, he hears what Mercury offers and he slowly turns to face her, eyebrow lifting incredulously.]

...of course you can. Why wouldn't you be able to manipulate space? [A wry grin.] Is it easy for us to get out of if we need to?