Use this coupon code at checkout: 75D9ZKH7
Right now you can get the 36W Dual Fast USB Car Charger Adapter for $17.99 on Amazon. Use coupon code: 75D9ZKH7 to get an additional $13.49 off to make it $4.50. Shipping is free with Amazon Prime for orders over $25.
Amazon.com price frequently change and can happen at any time. Please refer to post date to see when deal was posted.