max amps are not very good to other batteries. they are better then nimh but not very good in the lipo scene.
you may not notice the diffrence because you have not compared them to EVO or poly RC packs.
you will need to 2P them it may say 120 amps but like i said they are not very good. they would not be able to draw that amount of amps. i have lipos that say 140 amps 1P set up. but they are not worth a damn unless they are paralleled. and I'm only pulling a max of 100 amps.
2P you will need to buy 2 smaller batteries. 3000mah POLY RC cells
scroll down till you see the 7.4 volt 2500 MAH and then 7.4 volt 3700 MAH. . pick either one that will fit in the hull times 2
http://www.toddsmodels.com/Batteries/POLYRC/polyrc.htm