The best batteries I have used would have to be Reedy, Hobby People, and Orion. I have had a Thunder Power it is a great battery, but they do not last nearly as long as the three I mentioned. Due to them not lasting more than 2 seasons I would rather get a venom battery over a Thunder Power. The only problem with Venom is only there red 2s are good. That is why I will not recommend them. The Gens Ace batteries also are great, but after a season they produce less and less power ever time you use them. Not 100% sure about other brand. Therefore, I will not mention them.