How to fix stuck Apple Magic Trackpad (A1339) battery screw door and battery corrosion.

How to fix a stuck Apple trackpad battery screw on door that is stuck because of corroded batteries. How to get the white battery acid leaked battery residue out of the battery compartment of an Apple Magic Trackpad (A1339). Try this at your own risk, but it fixed mine. You&need: * A nickel * Pliers * A hammer * Vinegar or Lemon Juice * Paper towels * Q-Tips * Old Toothbrush 1. Use a Nickel in the &slot&on the Trackpad screw-in battery compartment lid. 2. If the compartment doesn&open easily, then it is probably sealed with battery corrosion. 3. Being careful not to crack the trackpad glass or hurt yourself, use pliers to turn the nickel in the slot while you have a friend tap on the edge of the nickel with the hammer. This will loosen the calcified battery leakage from around the threads of the battery compartment screw-mount door. It may take some force, but it should eventually come loose. 4. If the door still does not budge, you may try dripping some vinegar around the battery door and leave it to soak in for a while to loosen the corrosion that is sealing the door threads. 5. Once you have the door unscrewed, try to get the batteries out. They will likely be stuck inside the battery compartment tube. 6. Dripping some vinegar on top of the stuck batteries and letting it soak overnight should loosen the batteries enough that you can tap them out CAREFULLY on the edge of a table. BE CAREFUL not to break the thin trackpad glass on the surface of the trackpad by hitting...