I just got my 2 - 12v 10ah lithium batteries from Amped today. They are going in my 10 year old 24V Ice Gator, replacing the 20 pounds of batteries with 6 pounds the new batteries weigh. I would have gone with the 12ah batteries but Matt at Amped didn't recommend running those in series. But the 10ah batteries were OK to do so. Of course I had to get 2 lithium chargers so I could charge them both at the same time.