screws that hold battery in
The ifixit installation manual shows two screws holding the iphone 4S battery: one, a 1.7 mm phillips screw, the other, a 1.5 mm phillips screw.
Nobody in town has phillips screwdriver bits to fit or precision driver kits, for that matter. Ifixit's "liberation kit" includes a pentalobe driver (which I now have) and another driver, a #00 Phillips head which is not otherwise specified as to bit size, but I wonder if it is supposed to fit both the 1.7 mm and 1.5 mm screws? What is the true bit specification for that seemingly "dual purpose" screwdriver?
I see the following declaration for the ifixdit #00 driver.
"Also indispensable for bridging the divide between squabbling materials, the screwdriver helps keep a healthy perspective on petty conflicts. Screw the differences today with our Phillips #00 screwdriver."
My impression is that the ifixit Phillips #00 screwdriver is meant to be used to replace the pentalobe screws with appropriate Phillips head screws...that it has nothing to do with the two different Phillips head screws that secure the battery inside the case.
Or, does the ifixit declaration mean an ifixit #00 phillips screwdriver will "bridge the divide" between 1.7 mm and an 1.5 mm screws and not strip their tiny little heads?
For a simple, straight forward answer: Yes.
The iFixit #00 Phillips Screwdriver will work with both the 1.7 mm and the 1.5 mm screws without stripping their heads.
You didn't miss anything.
The meaning is simply fogged by their use of rhetoric in the product description.
Rest assured that the iFixit #00 Phillips Screwdriver is made to fit both the 1.7 mm and the 1.5 mm screws that fix the battery in place and is used for that purpose.
Here is the documented step regarding the two screws in question and their associated tool: