LumsingDirect via Amazon offers its Lumsing Series 21-watt 4-Port USB Wall Charger in Orange, model no. 206-1015-1004, Grey, model no. 206-1015-1002, or Blue, model no. 206-1015-1003, for $10.99. Coupon code "Lum4PORT" cuts it to $5.49. With free shipping, that's the lowest total price we could find by $6, although we saw it for $2 less in July. It purports to detect and automatically switch to the right charging mode of the connected digital device for full speed charging of up to 4.2 overall amps. Deal ends November 27.