This high quality replacement APPLE ac Adapter provides your laptop with safe and reliable power. Plug in and use your laptop even without the battery, extending your laptop battery life.
Apple A1172 AC Adapter Features
¤ Constant output currents ensure rapid, reliable charging Laptop AC Adapter.
¤ Fast charging extended laptop battery life.
¤ Rapid charge technology for faster, more accurate charging.
¤ 100% compatible with original ac adapter.
¤ Short-circuit protection for safe operation.
1. Determine the desired output specifications of the AC adapter, such as DC 18.5V 3.5A. You'd better choose an adapter with the same output. If you really can't find it with the same output, you need to control the difference of the outputs in +\-1V\A. For example, if the output your old adapter is 18.5V, 3.5A, you can choose a adapter with the output between 17.5V\2.5A or 19.5V\4.5A. Do not short-circuit.
2. Determine the part number on your old laptop adapter, such as Apple A1222. When you get this information, you can search online with such a title 85W Apple A1172 Power Adapter.
3. Determine the size of the adapter plug. Plug sizes are normally measured in millimeters.
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