BETTER MALL 4PCS Silicone Protective Gel Skin Case Cover for 18650 Battery (Purple) 4PCS Silicone case to protect 18650 battery, Batteries is not included Flexible, lightweight and portable, easy to store and transport Set down your mod on any surface with this non-slip protective cover Comfortable to hold and grippy surface in case you are clumsy Safely protects your 18650 batteries from unprotected hazards