Abstract: A cylindrical battery comprises a cylindrical battery electrode assembly having two ends, which comprises a core bar, a positive plate and a negative plate coiled on the core bar, and a diaphragm separating the plates. The cylindrical battery also comprises a positive electrode lead-out terminal, disposed at one end of the electrode assembly and having an inner end surface facing the same. The inner end surface of the positive electrode lead-out terminal is directly connected with the entire end of the positive plate at the corresponding end of the electrode assembly. The cylindrical battery further comprises a negative electrode lead-out terminal, disposed at the other end of the electrode assembly and having an inner end surface facing the same. The inner end surface of the negative electrode lead-out terminal is directly connected with the entire end of the negative plate at the corresponding end of the electrode assembly.