I can't open the 3ds and take the battery out but I did so with the 3dsXL...the battery is not in it.
I only have one small screwdriver to open the back. The one included with the generic chinese battery I bought...it doesn't seem to work with the screws on the back of the normal 3ds...
Oh, i see, yeah i dislike those screws too, they are always hard to open if you don't have the right tools. Which no one ever does.
Wonder if I should order that : http://www.fnac.com/mp19830631/Tournevis-pour-Nintendo-3DS/w-4?ectrans=1&gclid=CLT0ltjIjM4CFQu4GwodfPYAJA&mckv=FLHxWVPu_dc&oref=2c0a3f40-26c6-447e-da08-9f19a3d12568&Origin=CMP_GOOGLE_MP_CONSL&pcrid=77058266903
Ordered this : https://www.amazon.fr/gp/product/B006RJ388Y/ref=oh_aui_detailpage_o00_s00?ie=UTF8&psc=1 instead
I always try to buy things that are cheap: no more than 10 euros for small things and 100 euros max if it's a console or smartphone...