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hi i have an iphone 4s. While i am changing it’s battery i lost battery conecter’s two screws so i bought screw set i don’t no what screw is battery conecter’s screw I hope you to give me some pictures and advises Please help me

The shortest screws!

Sanghee, check this guide step 4 shows that " the following screws securing the battery connector to the logic board: One 1.7 mm Phillips screw One 1.5 mm Phillips screw." Hope this helps, good luck.

Somebody should make a complete screw list. The ifixit ones are not precise enough, some screw s that have the same length have different diameter and heads, which mix things up during assembly