In ground equipment, lithium-ion batteries are mainly used in military unmanned ground vehicles, robots, hybrid electric combat vehicles, etc. For ground tanks powered by hybrid oil and electricity, the use of lithium-ion batteries as a power source can not only reduce fuel consumption and reduce logistical burden, but also improve the tactical vehicle's power and survivability. At present, the multinational military has stepped up the research and development of lithium-ion battery modules for hybrid electric-powered combat vehicles, unmanned ground vehicles, and ground robots. However, for large-scale ground equipment, weak lithium-ion battery power is the main factor restricting its further application. Therefore, in the future, it is necessary to continue to develop lithium ion batteries with high specific power and low cost to meet the mission requirements of ground equipment. According to this passage, lithium-ion batteries? ['There are deficiencies in the application of large equipment.', 'Widely applicable in military applications.', 'Being vigorously developed as a new battery by various countries.', 'is the development direction of the future battlefield power source.']