I have a pair of cordless electric scissors purchased many years ago. Unless they have changed dramatically (and looking at photos, it doesn't appear to me that they have), they are not accurate for cutting quilting pieces. They are useful for cutting large pieces of fabric and batting into smaller pieces, and for cutting up jeans, and I saw a very talented friend use them to quickly cut out patterns for baby clothes (by eye, no paper patterns!), but they simply are not very accurate. I think they could be used to cut pieces for paper-piecing, but not for regular piecing.
Also, when I used mine, I found it hard to get used to the vibration in my hand.
The Accququilt Go! is a good choice for people with hand or wrist problems, but it is relatively expensive even when purchased discounted.