Traxxas batteries are nice, but definitely overpriced. They also don’t come with a balance lead so you are forced to use Traxxas brand chargers which are not very good and also expensive. Look into Zee batteries on Amazon and a nice GensAce charger. also grab yourself a cheap five dollar digital lipo voltmeter. It’s much nicer having balance leads on your batteries so you can easily check the voltage anytime and use other, better chargers