Weidini via Amazon offers the Tigernu 15.6" Laptop Backpack with USB Charging Port in Red for $26.99. Coupon code "AT24GWN5" cuts it to $17.54. With free shipping, that's tied with our mention from two weeks ago in a different color, $9 off, and the lowest price we could find. This water-resistant backpack features a built-in USB charging cable (battery pack sold separately), anti-theft zippers, and combination lock. Deal ends March 31.