aye there's a phillips screw on the battery, but the screwdriver i'm on about would perhaps be the right size to repair your spectacles, proof in my opinion that the toolkit is a generic one rather than having any thought put into it.

hey-ho, never mind - a lot of folks will never use the toolkit anyway, and those who do will always add to it/alter it to suit, so i reckon its just a minor niggle anyway.