Amazon has the Zippo Double Plasma Arc Lighter Insert (Silver, 65828) for $14 with free shipping on $35+ or with Prime. Has a 1-hour recharge time, 40 5-second uses per change, and 300 charges per battery (12,000 total uses).

• Zippo 65827 Butane Double Torch Lighter Insert for $14
• Zippo 65826 Butane Single Torch Lighter Insert for $14