Looking for a dedicated cassette tape rewinder so I can do a full Fast Forward and Rewind before I start my recording. (I prefer doing this in another unit rather that my personal recording or playback deck) I mostly use 90 to 120 minutes and I want to spool the media correct and evenly so the machine has to be strong and consistent. I'm not sure if you can get this machine in battery operated. But either battery or ac is fine with me. As much as possible I don't want to get another cassette deck just to rewind especially if the size of the deck is the normal size which is big for my needs and might take up some extra space. If you guys have something in mind, please let me know. Thanks..