Groupon offers the Wagan Solar-Powered Classic LED Lantern
, model no. EL8533, for $49.99. Coupon code "VISA5" cuts that to $47.49
. With free shipping
, that's the lowest total price we could find by $11. It features a built-in 5-volt 2.1-amp USB to charge smartphones and other mobile devices, a 4-watt solar panel, overcharge protection, and two settings.