This is a special type of lithium battery with low-temperature working ability, which can be widely used in electric bicycles, electric motorcycles, small power supply systems, as well as special equipment, civil aviation, aerospace, deep-sea snorkeling, polar science, exploration, cold zone rescue, disaster relief and other fields. it has the following advantages: Good low-temperature performance - able to maintain a high discharge capacity within the low-temperature range of    0 ° C to -60 ° C, with high charging acceptance and low self discharge rate. Long lifespan - with a good cycle life, it can maintain a long service life even in low temperature environments. Good safety - no explosion or combustion hazards, can withstand short circuit impact without damage, and is safer to use. Environmental protection - no memory effect, does not produce harmful substances and greenhouse gas emissions, meets environmental protection requirements. Portability and Customizability - small size, light weight, easy to transport and carry. Meanwhile, the battery size is flexible and can be customized according to customer needs. Excellent discharge performance - discharge at -40 ℃ and 5C, with an efficiency of over 75%; Discharge at 0.2C in an environment of -40 ℃, with a discharge capacity of over 85%.