Zippo 40580 Heatbank 3 Rechargeable Hand Warmer and Power Bank - BLACK. Keep your hands warm on even the coldest days. The HeatBank® rechargeable hand warmer keeps you warm from the office to the woods. The convenient power bank feature also recharges your USB compatible device, so you can stay connected while enjoying the outdoors. FEATURES: --Charges USB compatible devices including; mobile phones, Mp3 players, tablets, cameras, etc. --Dual sided heat up to 113°F/45°C operating temperature with high and low settings for adjustable and comfortable warmth --Battery and heat indicator lights --Rechargeable 2600 mAh Lithium polymer battery (included) for lasting reliable warmth - up to 3 hour run time --Hand Warmer Specs: --Height: 3.63" --Width: 1.63" --Depth: 0.59" --Weight: 2.2 oz. --Warranty: 1 year through Zippo NOTE: This warmer/bank does NOT use any fuel or burners.