Earlier this month I posted this link to Kaye Wood’s 6 hour quilt. It uses 6 inch strips of fabric and batting or wadding -
https://www.quiltingboard.com/main-f1/kaye-wood%92s-6-hour-quilt-t306121.html
I made a small one just to see how it worked out. If you watch the video you will see Kaye uses a serger. I did too but I was not keen on the completed seams. Each seam has 2 layers of wadding and 6 layers of fabric and although they are compressed by the overlock stitch to me the seams are stiff.
It is a quick way to make multiple charity quilts though - as Kaye suggests.
Your strips of batting would be ideal for a similar style quilt, perhaps using ‘quilt-as-you-go’.