The 0-30 works well but you must be very carefull to not let them get to low. If you leave the cells on it to long you can damage the pack. The novak smart tray is about the best one that I have tested, But it does take quit a while to discharge a pack. The new trinity unit is nice also but it takes a long time to discharge also. If you have 30 to 40 minutes then the novak or the trinity are the way to go.
Remember, Every thing I post is just my opinion, But if you don't agree with it, You know where you can go.... LOL