I have been using the Anker vertical mouse for 11 years. Just replaced my first one recently and bought my second. I use AAA rechargeable batteries that last months on end.
There’s a company that makes a clone of this with a USB charging cable. It was OK, but I like what I have.
I have been using it and really enjoy it. I was using Nine and couldn’t stand the way it handled folders and incoming mail.
Better experience in my opinion.