I used auto lipo,12v and custom 12.6.But I used 2 different pairs of freshly peaked 8000mah lipos. I ended up with the Medusa and MM in my Emaxx.It's my spare truck that I let my son drive so it's about perfect for that.No motor heat sink,or fan on esc,geared 20/58.In 20 minutes of driving the motor was 107 esc 120. My Novak was 99 motor,102 esc.