The 400v2 is one that I was looking at. There is another one just like it, but is dual 200w chargers in one. so you can charge two batteries at once. I'm looking to the future though when I have 6s packs and need to charge upwards of 6 amps for 1c. That is 133 watts by it's self. And if you charge over 1c, then you are going to need to double that number. So, the 400 would work, but "would work" is not what I'm all about. Bigger and better hahahaha. I will look into that 400v2 though and give it some thought.