There's no battery pack included. It's following the current 360 standard - two alkaline AA batteries included. A P&C kit is sold separately, though I don't see why you'd need one if you have rechargeable AA batteries for 360 controllers now.
A micro USB cable will not charge rechargeable AA batteries. It should charge the battery pack from the P&C kit.
Keep in mind it cannot safely charge rechargeable AA batteries. There's more than one chemical mix used to create AA rechargeable batteries. That's why the P&C kit packs use a different set of terminals inside the controller.
controller does comes with a wire... it is to make the controller a wired controller... as opposed to a wireless.... just it will not charge anything.. once plugged into the controller.. it looses connection with the batteries .. so charging is out of the
question.. we will need a P&C kit
The standard controller inside the box does NOT come with a usb cord, nor the 2nd standalone controller. You can verify this with the "unboxing" video. I don't know why "tohellenback" thinks otherwise.
If you want to be able to charge your XB1 battery pack while using it you need a PnC kit. A standard usb cord WILL charge the XB1 batt pack but, you'd still need to buy a PnC kit to get that rechargeable XB1 batt pack. Usb cord WILL NOT charge any other
type of rechargeable batteries but, will offer a corded controller option.
You have 2 options:
1. Pnc kit-$24.99 [comes with MS XB1 batt pack and a usb cord)
2. Pnc controller kit-$74.99 [comes with above-mentioned plus 1 controller]
Otherwise you go the way of regular AA batteries or rechargeable AA batteries with their own standalone charger.