Apple 2009 MacBook Specifications download pdf (Page 60)

60 Chapter 5 Last, but Not Least

MagSafe power specifications:

Â Frequency: 50 to 60 Hz, single phase

Â Line Voltage: 100 to 240 V

Â Output Voltage: 16.5 V DC, 3.65 A

Battery Do not drop, disassemble, crush, incinerate, or expose the battery to

temperatures above 212° F (100° C). Stop using the battery if it appears damaged in any

way. Replace the battery only with an Apple-authorized battery for this product.

Dispose of used batteries promptly according to your local environmental guidelines.

Hearing damage Permanent hearing loss may occur if earbuds or headphones are

used at high volume. You can adapt over time to a higher volume of sound that may

sound normal but can be damaging to your hearing. If you experience ringing in your

ears or muffled speech, stop listening and have your hearing checked. The louder the

volume, the less time is required before your hearing could be affected. Hearing

experts suggest that to protect your hearing:

Â Limit the amount of time you use earbuds or headphones at high volume.

Â Avoid turning up the volume to block out noisy surroundings.

Â Turn the volume down if you can’t hear people speaking near you.

High-risk activities This computer system is not intended for use in the operation of

nuclear facilities, aircraft navigation or communications systems, air traffic control

systems, or for any other uses where the failure of the computer system could lead to

death, personal injury, or severe environmental damage.

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Apple 2009 MacBook Specifications Page 60