BETTER MALL 18650 Battery Protective Case Silicone Cover Gel Skin for 18650 Batteries ( 10 Pcs ) (Mixed Color) 10PCS Colourful 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