Update: This popular deal is now available again.

GeekBuying via Amazon.com has Tronsmart Quick Charge 2.0 42W 3-Port USB Wall Charger + 6' Micro USB Cable on sale for $19.99 - $10.50 off promo code 3USBWALL (apply at checkout) = $9.49. Shipping is free with Prime or if you spend $49 or more.

Note, item must be sold by GeekBuying and fulfilled by Amazon in order to receive the discount.