Anker A1229 PowerCore Slim 10000 Charger (USB-C Input Only) $15 at Amazon
Amazon with AnkerDirect has the Anker A1229 PowerCore Slim 10000 Portable Charger (USB-C Input Only) for $19 - $2 off coupon
(check green "Save coupon" box) - $2 off with code
ANKER1229011 at checkout =
$15 with free shipping on $25+ or with Prime.
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