Is it safe to use older chargers with new machines?

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Is it safe to use older chargers with new machines?

Hello,

I purchased a Macbook Air 11-inch in March. I previously had owned a first-generation MacBook Pro 15-inch, and was just curious as to whether it is safe to use the charger from my Macbook Pro 15-inch to charge my new Macbook Air.

The following is what appear on the chargers:

Macbook Pro (First generation): Apply 85W Portable Power Adapter

Macbook Air (Latest model): Apple 45W MagSafe Power Adapter

Is the older charger safe to use and will it not damage the battery on my new Macbook Air?

Thank you.

Kind regards,

MacBook Air

Posted on Jun 1, 2012 7:04 AM

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Answer 1

captfred

Level 7

26,446 points

Jun 1, 2012 7:28 AM in response to roo22

Yes, you can use the 85W adapter with your MBair. It's ok to use an adapter of a higher wattage, just don't use one of a lower wattage. ie don't use the MBair charger with the MBpro. Here's the apple article.

http://support.apple.com/kb/HT2346

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Answer 2

roo22 Author

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Jun 1, 2012 7:34 AM in response to captfred

Thanks for your prompt response. I came across the page you linked earlier, and found this:

"Note: Adapters that shipped with the MacBook Air (Original), MacBook Air (Late 2008), and MacBook Air (Mid 2009) are not recommended for use with MacBook Air (Late 2010) models. When possible, use your computer's original adapter or a newer adapter."

Just out of curiosity, if the earlier 45W Macbook Air chargers are not recommended for use with the latest version, then why is it safe to use the 85W charger from 2006?

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Answer 3

captfred

Level 7

26,446 points

Jun 1, 2012 7:45 AM in response to roo22

I think it was more to do with the premature fraying of the cord where it enters the L connector. Notice the additional support on later models.

I don't think there's any difference in the actual power supplied. I have both the original 2008 and latest 2011 and use the adapters interchangeably with no issues.

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