Originally Posted by kalmon
The best batteries are sold by RCBabbel here on the forum, they are custom hyperion packs, very light! As to the plug all of the HH UMX micros use a special UMX plug that is both a discharge lead AND a balance tap. Glenn at rc-connectors makes adapters and parallel charge cables. There are a couple other places too that make the adapters. I'd strongly suggest getting high quality pack and not the HK stuff. The plane performs so much better with strong packs.
+1 on the BabbelBatts
I have bought a bunch of Hyp 240s from RCBabbel. If you are so inclined you may as well get some GWS 5030 props too.