Battery Model/Type: Turn the croc light anti-clockwise to Unscrew the head of the light. Remove the insulation pad between the two batteries. Make sure the batteries are kept in positive and negative directions. Tighten up properly to avoid poor contact. If the battery runs out, replace the battery. Recharge Model/Type: Croc Lights for charging come in various styles. To charge, rotate the crocodile light counterclockwise, unscrew the light head, or locate the charging port cover on the side of the light. Open the cover and insert the USB charging cable into the port. The charging indicator light will illuminate, indicating that charging is in progress. A change in the indicator light's color signifies a fully charged lithium battery. Tighten correctly to avoid poor contact and prevent water ingress.