Apple 11" Intel i5, 64GB SSD MacBook Air

Do this refurbished laptop come with a new battery? Given how quickly the batteries on the Airs seem to deplete, that is my main concern before possibly buying.

The batteries are tested to make sure they are good.

Sorry, I should have been more specific. Do these refurbished laptops hold the same charge as a new laptop? My current Macbook Air 13" only holds a charge for two hours because I’ve had it for a couple of years. Since I’m buying this primarily as a writing computer to take to coffee shops, etc. the battery is the most important thing to me. Is is possible to get one of these that has less time than the stated battery life because it was previously used? Any more specific information about battery life is appreciated.