Chemistry, performance, cost and safety characteristics vary across LIB types. Handheld electronics mostly use LIBs based on lithium cobalt oxide (LiCoO 2), which offers high energy density but presents safety risks, especially when damaged. Lithium iron phosphate(LiFePO 4), lithium ion manganese oxide battery (LiMn 2O 4, Li 2MnO 3, or LMO), and lithium nickel manganese cobalt oxide (LiNiMnCoO 2or NMC) offer lower energy density but longer lives and less likelihood of fire or explosion. Such batteries are widely used for electric tools, medical equipment, and other roles. NMC in particular is a leading contender for automotive applications.