Check out YTs website. They had some Decoys immediately available for shipping (in US anyway). You'll love the JOY of shifting into a higher gear going uphill LOL!
Congrats!. Sorry you had this problem, but your taking the time to discuss helps all of us. YT is pretty good about standing by their product. I trust you will receive a new battery very quickly.
I had a great experience with support. I sent them my order number via email and they contacted me the next day with delivery info. Had a couple of issues in assembly and they stepped be right thru it.
Just checked YT's Decoy page. Blue available in M, L, and XL. Black available in L and XL If you want an incredible Ebike, you need to jump on this. Love mine. I ordered and one week later they were all gone except the very top end, and even they went a week or so later. I rode 17 miles on flat...