For the best launch, your LiPo packs need some help. A Cap Pack is a series of high rating capacitors to assist your battery to supply the instantaneous power response. These cap packs are designed to work with 2S LiPo packs. Also useful for oval racing on high bite tracks.
Easy install (need soldering iron). On the battery side of the ESC, find a convenient area to strip back insulation. Solder the wires (observe polarity: Red to Red and Black to Black) to the battery wires going to the ESC. If you have any questions email me! Observe polarity!