1. Unscrew the "220V Cooling Fan" cover the 10 Pentalobe screws: down four screws 3.0mm respectively, each about 2.3mm of a screw. If you're new to Apple products, dismantling, as usual the first to understand the next several screws Apple models.
2. From the edge of the "220V Cooling Fan" cover lifted aside the internal parts completely in front of us.
3. When you see the warning label covering the battery connector head yet, opened a little, but did not need all the tear.
4. Use a flat head pry the knife, gently pry the "220V Cooling Fan" battery connector. Battery connector is placed on the motherboard, you can pry out. Then towards the direction of a breaking tag, disassemble and replace parts in the process, make sure not to touch the connector with the motherboard.