L have a DKNY WATCH model no. NY4062 unable to get back off to replace battery can you please help

All about changing watch batteries and removing the back.

https://www.fixya.com/support/r27181038-changing_watch_batteries

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Not sure if you want to attempt this yourself, and advice above to go to a jeweler is excellent, and I marked it Helpful.

Here are three videos on changing a watch battery in a different model:

https://www.youtube.com/watch?v=Dcd3it40yKY

https://www.youtube.com/watch?v=dAsI7ognlDs

https://www.youtube.com/watch?v=bOEUZ3tqvgI

please see attached website.www.esslinger.com/watch-crystals/

Get new watch.

I had to look into this for my wife's DKNY watch and this particular model has a Ronda 751 quartz movement, which takes a 379 battery. You can verify this by entering the movement name 'Ronda 751' and you'll see pictures of the movement with a 379 battery inserted.

Have you ried taking it back to the supplier? If it is still under warranty, then they should be willing to replace tha battery and if that is not possible they should replace it.

I doubt if any watch maker makes their own batteries so any battery that is the correct size should do the job.

DKNY is typically a quartz movement and doesn't have a "winder". I believe the part you are referring to is the crown. The watch may have stopped working for several reasons. The first three things I would suspect is that the battery died, the watch is in the set position, or the movement was damaged when the crown was coming off. If the watch is in the set position then pushing the stem in will cause the watch to run. The next thing to do is to replace the battery since it is only a few bucks. If it runs then you can replace the crown and your set. If it doesn't run I would suggest replacing the movement along with the crown and that you will have to price and see if it is within reason since this type of repair wont be covered under warranty.
Depending on the model of DKNY you may have to go through DKNY for the part. Remember that they are manufactured by Fossil. You could save yourself a lot of time by going to your local watch repair shop.

Thanks!

For closing your caseback you need the man with very strong hands first, but it might not work as some casebacks can be closed using special tools only.
Before you visit the watchmaker, try this: first of all open your bracelet by taking out spring lug. This will make more space at the back. Then take watch caseback and check for groove in it. Align that groove with stem (pin going into watch movement) and deepen grooved caseback side as it should be. Then without turning caseback apply great pressure with both hands to the watch(from caseback and dial sides). If hands are strong enough, caseback should snap on into place.
In case if it doesn't work, find a piece of thick leather (wide mens belt will do) and place it on completely flat surface (table top). Place the watch face down on that leather, adjust caseback groove with stem again and try to press caseback down with both hands, only this time using your weight.
If all mentioned above doesn't work- you have to go to see watchmaker.

Good luck.

Arthur