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.

[BrianG]

Sure it's right! :)

Seriously though, the 8XL is rated for 1875 rpm/v. If you increase the voltage by 4.4v (from 14.8v to 19.2v), you will be increasing the total rpm by over 8,000 rpm! Depending on the gearing, tires, weight, etc, that can easily translate to 10mph...on paper.

In the real world, you won't get that speed. When you run the motor hard, the heavy battery current will cause some voltage drop. And since you are running more voltage through the same motor and same vehicle load (gearing, weight), you are going to pull more current, which will result in more voltage drop. So, 16 cells will seem more like 15 cells speed-wise because of this drop.

This is why I have so many volts/cell options. You can use 1.2v/cell for a nominal speed rating. But then you can also use 1.1v for a more realistic voltage when running the batteries hard.

I hope that all makes sense! :)