Add a tiny dab of kitchen cleanser on the tip of the screwdriver. That sometimes provides enough grab to get the screw out.
Tweezers knife small pliers a small flat head screw driver anything you can do to get under the head also get a magnet but not a real strong one i would say like if you have any on your frig to you can pull out the screw if it is going around and around and your going to have to find another one to replace it
Why are you trying to replace the battery? They are RECHARGEABLE.
Ooooooooo!!!!!
I'm trying to replace the battery in my iphone 4 and there's a stripped screw inside where I need to remove and replace the battery.