Do yourself a favour and get a Suntour NCX.
Question about the Sutour NCX - will it cope with a frog battery on the back or will it get broken? I am aware that there is a thread with a couple of severly damaged seatpost shots as shown by d8veh due to frog style batteries but that is what I have, so I have to live with it until I can redo my bike entirely or get a new one!
James