Corally doesn't really have a good reputation because they lie about their cars' durability. I would steer clear of Corally for now. If you want to see their cars' durability, look up Kevin Talbot on YT and find his Corally video. That will give you an idea of how strong their cars really are.
Just cut off the crappy TRX connectors! Then replace them with xt90s or xt60s (My personal preference). If you do that you can use any battery brand that you want.
dang you beat me to it