For those thinking chitin was a mere ingredient in few recipes and a good source of organic phosphate (in case youre playing with pyHT)...well..here the main use of chitin. To make chitosan, its a medium sized chain unlocked at blue science that will allow several new recipes as well as the production of nanofibrils which also have uses like in filtration media, optical parametric oscilators and specially the bio-batteries. Yes, batteries was added to C2, and the new kind of battery was also added to C3 and C4 because we cant run that super high-tech stuff with puny chemical batteries. In the future, nanofibrils will be use to make animals faster and more.