HaMi via Amazon offers its HaMi 5-watt 18-LED Cordless Desk Lamp for $12.99. Coupon code "6VZYDZFH" drops that $6.49. Plus, Prime members receive free shipping. That's tied with our July mention and the lowest price we could find by about $9. It features three light settings and lasts from three to nine hours per charge, depending on which light intensity setting you use. Deal ends December 31.