These new packs are lighter than higher capacity packs, use a 150C discharge rate, and are available in 2S-7S configurations. Check out all the details in the press release below:
Looking to save a little weight for your next race? Our new 4000mah 150C cells will do the trick. With the lower mah and the high discharge rate you are getting the best bang for the buck. Perfect for most 1/10th scale setups.
More information on these exciting packs can be found here: http://www.maxamps.com/products.php?cat=370