100% New genuine 18650 cells Superb discharge and storage capacity Low self-discharge and good discharge performance at low temperature. Best for EV, DIY projects. Cylindrical cell, No memory effect and longer storage life than NiMH Batteries, Lighter weight and higher energy density than any other rechargeable battery-Ion cylindrical rechargeable batteries 3.7V 2500 mAh high capacity High energy density and lower weight than other rechargeable batteries Battery tested based on International Electro technical Commission (IEC) standard to ensure capacity, quality, and life time. Also recommended for heavy duty motors for more power efficient.