1.Rinse the torch in fresh water after use in seawater to prevent corrosion, and please keep in clean, dry environment.
2.Please don't disassemble the sealed head, doing so may cause damage to the flashlight and will void the warranty
3.Please replace the O-rings if they are damaged after prolonged use and regularly lubricate the o-rings so as to not erode the rubber. Doing so will keep the flashlight properly sealed against water.