What you will need: - A small screwdriver - Heatshrink (Non Adhesive preferably) - Insulation tape - Heat gun (Preferably) OR a lighter. Basically, take off the bulky housing that surrounds the terminal that fits into your iPhone. Mine had two small clips either side that i prized open with a small screwdriver. Slide the heatshrink over the bare terminal to insulate it. Et voilà.. A charger that fits into your IP4 with bumper.