The EC5's are rated at 120A continuous amps when used with a 10awg wire and basically are 5mm bullets in a plastic case.
http://www.e-fliterc.com/Products/De...odID=EFLAEC502
A few other ratings can be found here:
http://www.rchelicopterfun.com/rc-lipo-batteries.html
Of course I can't confirm or deny any of these ratings. I have to believe what I've read in several forum posts and what the online stores specify. I've never seen the EC5 rated higher or lower than 120A.