brushed hv setup questions

[Thunderbruiser]

Ok i've decided to try and make a homemade 13cell(15.6v) 3700mah battery for my rustler so i could drag race around my home. I've wired them up but they're slow about as fast as when i ran the truck on 7 cells

did i wire them wrong?

I connected the batteries by stacking them on top 6 cell pack on bottom,7 cell hump on top and then I made a connection negative to negative, and positive to positive both front and rear and then left the 7 cell hump the way it was..my question is is that correct or wrong?

illustration of my wiring job:



front of pack



rear of pack

[kulangflow]

Sorry nobody answered this sooner.

You need to wire them in series to achieve the voltage you're looking for. The negative of one pack needs to connect to the positive of the next pack.

Hopefully this quick drawing helps:



Of course, it's been a while now and you probably already figured it out!