This is the cell Modlite recommends for the PLHv2 and OKW light heads. This cell will also work with the SurefireA(R) M600DF and Streamlight HL-X lights for optimum performance. This is the best batteries Modlite offers for high discharge flashlights. The cell inside the battery is made by LG Chem in Korea. Modlite then adds 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. These are manufactured with a very high quality PCB including a Japanese Ricoh protection IC for 18A high current cutoff (most PCBs will not be able to handle this much c Mfg: Modlite Systems