The New Nintendo 3DS XL does not come with an AC adapter. If you don't have one, you must buy one. Nintendo says there's a good reason for that. Whatever that reason is, it's not fair.
The New Nintendo 3DS is an updated version of the 3DS, and it's truly a fantastic handheld. I cannot recommend it enough. I also recommend that Nintendo put AC adapters in the box when it releases the NN3DS XL, but their failure to do so is not a deal breaker (though it is annoying).