The batteries have a custom designed protection circuit which provides a variety of protection features built into the battery.
Battery Cell 18650: 900, 1000, 1100, 1200, 1300 series lights.
Battery Cell 26650: AL1800XWP, AL2600XWP (The Black Molly series) AL1800NP, AL1800NP-II, AL1800WP, and CF1800P.
Battery Cell 32650: TL2900P, TL3800P, VL4600P, VL4600PB, VL2900P, VL2900PB, VTL2900PB, VTL4200P, VTL4200.
Battery Cell 18650x4: TL52000P, VL9000P Tri Colour, VL1100P, VTL9000P, VTL9000PB, VTL9000P Max, VTL11000P.
Battery Cell 21700x4: CB7200P, CB71100P, CB11000PBRC, VTL13500P Max, TL8000P Mini
Battery Cell 18650x4 Supreme: TL3800P Supreme ONLY
Battery Cell 18650x7: VL20000P Pro Mini, VL20000P Pro Min Tri Colour, VL20000PBRC, CB16500PBRC, TL9000P
Battery Cell 21700x8: CB30000P-II, VL36000P, VL36000PBRC