Thats very true. Gary has a thread on here about some of the Lipos that he is using and the different sizes that you can get. Basiclly only use the 2S or two cell size batteries. Keep the Mah to about a max of 5000. I don't know if you can go highter than that but so far everything that I've read and watched pretty much keeps that at your max MAh for your tank. and charging safety. charging safety.

Here is good video done by the guys at flite test that go over the importance of charging safety. This isn't meant to scare anyone away just keeping you aware.
https://www.youtube.com/watch?v=gobFcNzGG9I