Pisen Electronics via Amazon offers the Pisen 2-in-1 Portable Wall Charger / 5,000mAh External Battery in Black or White for $22.99. Coupon code "5A89NMB2" cuts the price to $14.94. Plus, Prime members receive free shipping. That's $8 off list and the lowest price we could find, although we saw it for a buck less last week. It features two USB ports, a Type C port, and UK and EU adapters. Deal ends January 18.