This is all really interesting reading and certainly as a newb to the BL/Lipo world then by far the most difficult choice for me has been with batteries....it is a minefield....maybe literally in some cases!!!

I ended up just saying sod it, get a Hyperion 4S 6500mah....this has cost me a lot but everyone with far greater knowledge than me seems to rate them, good enough for me.

However, I am also going to look out for some good cheaper/secondhand packs or similar for just bashing and things where runtime is not so important. The Hyperion was mainly for the big mah to try to get a racing 20 minute final achieved on one battery.

But, when I buy cheap, I do it with the acceptance of risk and some personal responsibility. Not to say that if I get a cheaper pack from a store and it's crud that I won't expect a refund/exchange.....but that I do it knowing I might have some of that pain to go through....