Batteries in an old ipod mini and macbook pro needed to be replaced after years of use.
Install was quick and guides were very helpful. Tri-wing screwdriver was a must for removing the macbook pro's battery (stupid Apple screws). The spudger was useful but not necessary. Could have just used fingernails or a small screwdriver (gently)
The plastic opening tools weren't strong enough to pry open the ipod mini's top and bottom panels. Ended up using a small screwdriver. After 2 attempts the plastic was chipped and deformed to the point of being useless.