Battery lasts a long time, I would say around 10 hours.
If you forget to charge it, it can also be charged via micro-usb, e.g. with a powerbank.
No, no more cables to the Xbox controller as previously necessary on the 360. USB and optical cable to the Xbox One and that's it.
I am absolutely satisfied with this product. For example, you can locate the steps of the opponents in Call of Duty (WW2 and BO4) very well.