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Sure, I used my MacBook Air as a desktop replacement for a month when my MacBook Pro as in service (and my Mac Pro wasn't available).

It works fine and it's quite fast. The only issue is the fans spins up quite loudly for just about anything since it's a pretty small laptop.
 
@Cape Dave, from http://www.apple.com/macbook-air/specs.html:

"Dual-link DVI output using Mini DisplayPort to Dual-Link DVI Adapter (sold separately)"

I often work with a 24" external and the MBA screen as well.

That's only going to get him 1 external monitor, right?

In order to have two external monitors he needs to either use Thunderbolt monitors that can be chained together or he needs one of the monitors connected via USB which isn't a great option.
 
That's only going to get him 1 external monitor, right?

In order to have two external monitors he needs to either use Thunderbolt monitors that can be chained together or he needs one of the monitors connected via USB which isn't a great option.

to me it means I could have TWO DVI external monitors but will need that adapter. Not a problem. I like adapters :)
 
Interestingly, Apple has updated their battery information and no longer has the recommendation about making sure to run occasionally on battery power.

Maybe they decided this was putting unnecessary cycles on the battery and was not needed.

Updated information at this link.

http://www.apple.com/batteries/

The old info was creating a huge amount of confusion like we're seeing in this thread. People recommending that more battery cycles will improve the lifespan of the battery, which is absolutely backwards.

"With lithium-ion batteries, the capacity diminishes slightly with each complete charge cycle." <-- this is the key line from the updated info pages.

OP: You won't have any issues leaving the machine plugged in. My 2010 MBP has around 110 cycles and 94% of factory battery capacity, which is pretty solid for a machine that's now over 4 years old. It's rarely ever disconnected from power and frequently connected to an external display.
 
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