Battery type 18650 li-ion battery Application For Lights, tablet PC, digital devices, e-cigarette Typical capacity 2500mAh (real capacity) Typical voltage 3.7V Voltage range 4.2V~2.75V Battery demensions 18.23(D)*65.11(L)mm Unit weight 50g Capacity density 457Wh/L Specific energy 180Wh/Kg Standred charging current 1.1A (0.5C) Standred discharge current 1.1A (0.5C) Max discharge current 4.4A (2.0C) Cycle life 500T Tempreture -20°c~60°c Certifications CE, RoHS, UL