What is the Best Battery

[GorillaMaxx360]

I just was on rc calculations and i put in the items needed the first time around i put in 14.8 volts for the 2 team orion batteries and the second time around i put in 19.2 volts representing 16 cells Nimh the speed almost increased almost 10 mph does this sound right. Also can the 8xl with heatsink and the quark 125b w heatsink handle 16cells. (i think so just making sure). so for my purposes do you guys think nimh will work for me, for many reasons like: Can get like 10 more mph with more cells and voltage, cheaper, more basher friendly, more tolarable, and such what do you think about these batts for my needs. I now you guys like lipo but i will not need more than 15minutes and the ib3800 should do me good and i should get good voltage with not a huge drop of of voltage what do you guys think.