The Modlite 18650 3500mAh Battery is recommended for the PLHv2 and OKW light heads. This cell will also work with the Surefire M600DF and Streamlight Hl-X lights for optimum. This is the best batteries we offer for high discharge flashlights. The cell inside the battery is made by LG Chem in Korea. Modlite then add a high quality protection PCB/BMS along with the button/nipple top in an ISO 9001 certified factory to all safety standards. A black wrap is put over the top to hold it together.FeaturesMax Continuous Discharging Current: 10ATypical Capacity: 3500 mAhDischarge cut-off voltage: 2.5V (approximate)Voltage: 3.6VFull Charge Voltage: 4.2VCharge Current: 1.5A standardProtection Cutoff Current: 18A