You are asking if the battery will have a charge...well it depends on how long it has been sitting in the box after it was charged at the factory before they boxed it. If you ordered it straight from Apple, it should have a charge when you buy it, and run for at least a couple of hours. If you get it from a third party reseller, or on eBay, or anywhere else, it could have been sitting in a box for months. If it's a 2010 model, it could have been sitting in the box since April of last year and completely drained it's charge. A charged MacBook Pro (not on sleep but shutdown) will only last about 2 and a half months before it is completely drained. This is just like when you charge an iPod and turn it off and leave it for a few weeks, come back and it doesn't turn on. It loses charge even when it is sitting there, shutdown.