1byone Products via Amazon offers its 1byone 10,000mAh Dual USB Ports Portable Charger in White for $17.99. Coupon code "Y62UVP2H" drops it to $13.31. Plus, Prime members bag free shipping. (Non-members can spend $49 or more to qualify for free shipping; otherwise, shipping is $5.99.) That's a buck less than our October mention and the lowest total price we could find by $4. It features an LCD display. Deal ends November 30.