BETER MALL 18650 Battery Protective Case Silicone Cover Gel Skin for 18650 Batteries ( 2 Pack ) (Black) 2 Pcs 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