Thermacell Rechargeable Repellent Refills Features The Thermacell Rechargeable Repellent Refills are built to work exclusively with Thermacell s rechargeable repeller devices which are powered by a lithium-ion battery rather than butane. Each cartridge in this 2-pack is rated for up to 36 hours of effective mosquito protection covering a 20-foot zone around the user. Heat from the rechargeable device activates the repellent and full protection builds within about 15 minutes of startup. Because the refills are unscented they avoid the heavy citronella smell associated with older-style repellent products. These refills are independently tested and EPA reviewed for safety and effectiveness and Thermacell markets them as safe around people and pets when used as directed. The compact cartridge format is portable and TSA compliant so it can travel in a backpack tent bag garage shelf or tackle box until it is needed. Keeping spare refills on hand means a rechargeable repeller is always ready to go without an unplanned trip to restock. Backed by the Thermacell Guarantee this 2-pack of Rechargeable Repellent Refills is available for sale at GrabAGun. Thermacell Rechargeable Repellent Refills Specifications Manufacturer: Thermacell Model: Rechargeable Repellent Refills Color: Black / Blue Effective Time: Up to 36 hrs Effective Distance: 20 ft Repels: Mosquito Scented: Unscented Rechargeable: Yes Quantity: 2 Available At: GrabAGun