need help with a lipo battery pack

[theslam19_98]

ok here it is can someone please help my mind out ok I and three cars I am building one it a crt.5 with a Mamba max in it with this motor Feigao 540 7L 3,511 RPM / Volt and a Losi 8t with a Mamba Max or thinking a Mamba Monster Max and this motor Feigao 540 9XL 1,853 RPM / Volt and a Revo 2.5 with a Mamba Max or thinking a Mamba Monster Max and this motor Feigao 540 9XL 1,853 RPM / Volt but now here is the part I need help with and i can not get it strait in my head what batteries to use this is my thought I want to use the same batteries for all and I want to race them up to as long as possible but these are the batteries i am looking at let me know what people think good or bad max amp Lipo 6000HV 2S2P 7.4V Pack


Please I need help with this