ATC via Amazon offers the Lumsing 13,400mAh Type-C Portable Battery Pack
in Black, Gold, or Silver for $29.99. Coupon code "ZN5MQRR9" cuts that to $19.99
. Plus, Prime members bag free shipping
. (Non-members can spend $49 or more to qualify for free shipping; otherwise, shipping costs $6.78.) That's $20 off list and the lowest total price we could find. It features Quick Charge 3.0, an LED flashlight, and is compatible with iOS or Android devices. Deal ends November 1.