SunValleyTek via Amazon offers Prime members the RAVPower Bolt 4-Port USB Charging Station in Black, model no. RP-UC07, for $12.99. Apply coupon code "BTSRAV10" to cut the price to $11.69. With free shipping, that's a buck below last month's mention and the best price we've seen. (It's a current low of $4.) (Non-members can spend $35 to qualify for free shipping; otherwise, it adds $6.98.) It features two 2.1-amp outputs and two 1-amp outputs.