Power bank for electronic cigarette

A device, comprising:

• a face shell;
• a back shell;
• a first panel;
• a second panel;
• an on-off button;
• a power adjustment button;
• a thread ring;
• a seal ring;
• a first electrode;
• a spring;
• an insulator;
• a sleeve piece;
• a second electrode;
• a silica seal;
• a battery cell;
• a control board;
• a silicone pad;
• a fixed ring;
• a display screen;
• and
• a light guide film;
• wherein:
• the face shell and the back shell are combined to form a cylinder comprising a first end and a second end;
• the face shell comprises a front face and a back face, and the first panel and the second panel are attached to the front face and the back face, respectively;
• the first panel comprises a first groove and a second groove, and the on-off button and the power adjustment button are disposed in the first groove and the second groove, respectively;
• positive and negative terminals of the control board are connected positive and negative terminals of the battery cell;
• and the control board and the battery cell are disposed in the cylinder formed by the face shell and the back shell;
• the spring is sheathed on the first electrode;
• the first electrode is disposed on the insulator;
• the second electrode is directly connected to the first electrode;
• the silica seal is sheathed on the second electrode and is disposed in the sleeve piece;
• the thread ring is disposed on the first end of the cylinder formed by the face shell and the back shell;
• the seal ring is embedded in the thread ring;
• the sleeve piece abuts against the thread ring;
• and
• the silicone pad is disposed on the second end of the cylinder;
• the fixed ring is sheathed on the silicone pad;
• the display screen is disposed on the silicone pad;
• and the light guide film is attached to the display screen.