Lithium battery and charge pal

The invention relates to the field of rechargeable batteries and discloses a lithium battery. The lithium battery comprises a lithium core, a battery casing, a USB (Universal Serial Bus) plug, an inner end cover and a PCB (Printed Circuit board), wherein the lithium core is arranged in the battery casing; an opening is formed in one end of the battery casing; the inner end cover is arranged at the open end of the battery casing; the USB plug has no metal frame and comprises a cathode conducting bar and an anode conducting bar; the USB plug is laminated on the inner end cover and is in sliding connection with the inner end cover; a sliding stopping structure is also arranged between the USB plug and the inner end cover. During use, the USB plug slides out of the surface of the inner end cover, and is connected with a charging circuit of the PCB through the cathode conducting bar and the anode conducting bar so as to be spliced with an external USB socket for charging the lithium core. The invention also disclo