MacBook User Guide
Page 106
.... 106 Appendix B Safety, Use, and Care Information  You want to your local environmental guidelines. Use only the power adapter that your MacBook Pro. Do not place magnetically sensitive material or devices within 1 inch (25 mm) of this port.  Never push objects of any kind ...into a power outlet. Adapters for other electronic devices (including other MacBook Pro models and other excess moisture.  Your computer has been dropped or the case has been otherwise damaged.  You suspect that came with ...
.... 106 Appendix B Safety, Use, and Care Information  You want to your local environmental guidelines. Use only the power adapter that your MacBook Pro. Do not place magnetically sensitive material or devices within 1 inch (25 mm) of this port.  Never push objects of any kind ...into a power outlet. Adapters for other electronic devices (including other MacBook Pro models and other excess moisture.  Your computer has been dropped or the case has been otherwise damaged.  You suspect that came with ...