The USB Single charger by Vap Procell is compatible with most cylindrical Li-ion batteries in the field of electronic cigarettes. Equipped with multiple protections, the single charger by vap procell can reactivate a completely discharged battery to 0V. It works with its micro-USB connection and any 5V and 2A source. The Single charger by vap procell is compatible with the following cylindrical Li-ion / IMR batteries: 26700, 26650, 26500, 22700, 21700, 20700, 22650, 22500, 18700, 18650, 18500, 184490, 18350, 17650, 16650, 16340 (RCR123), 14650, 14500.