I came across a good thing when I found the Hobbyking Ebay store. They had these 2200 20C 3s batteries on there for 11.99 including postage, but even better, they auctioned one off and I got it for $9.99 incl. post. I did a bit more research on these and found an item listing on the Hobbyking website, which explained that they were exactly the same as a normal blue Turnigy 2200 20C 3s, but with different connectors and an orange shrink wrap. They were made as part of the development of a RTF package that didn't go ahead. I just had a look for the link to this listing but can't find it, but I've got two of these and they're pretty good quality from what I can tell so far.