Chosen Solution

in the battery removal and exchange guide, you use a tri-wing driver to remove the battery if i remember correctly and i was wondering what size that tri-wing was? #0,1,2,3,4,5

The MacBook Pro Unibody batteries are secured with Y2 Tri-Wing screwdrivers, so I would say it’s safe to assume that it is the same for the normal MacBook unibody.