We have been using these new shorter and lighter lipo packs in the on-road and off road RC racing. From what I've noticed in the RC boating world that when you make your boat lighter it hands better and you get longer run times so just thought that boaters might show some interest in the shorter lighter packs.
PACK SIZE 95.7mm x 46.5mm x 24.7mm we call them shorty packs but they put out the same performance as the bigger heavier packs with the same Mah and C rating.
I'm not sure if anyone make a bigger MAh over 4400 but I'm sure the bigger shorty packs are just right around the corner. It seems like the lipo packs are getting bigger and strong month by month.
http://www.ebay.com/itm/220850133629...#ht_500wt_1413