GRECELL via Amazon has for Amazon Prime Members: 10000mAh Poweradd EnergyCell Compact External Battery Pack for $17.98 - $6 when you 'clip' the coupon on the product page - $8.99 with promo code FLVQSVC7 (apply at checkout) = $2.99. Shipping is free. Thanks Newbieseals
https://slickdeals.net/share/android_app/fp/537926