100% Brand New, Original Keeppower product- 18650 3600mAh Protected Rechargeable Battery- Min Capacity: 3450mAh, Typical Capacity: 3550mAh- Normal Voltage: 3.7V- Quality Lithium-ion rechargeable cell, In Built Safety Circuitry- Protection Circuit (Against overcharge, over discharge, over current and short-circuit.)- 4.2 volts max voltage and 3.7 volts nominal voltage- Over 500 charge-discharge cycles- Size 18.6mm x 69.0mm- Weight 48gPackage includes : (with industrial package)Keeppower 18650 Batteries x2Keeppower Power box