Costco stores nationwide and online at www.costco.com from March 2019 through December 2020 for the 1-pack for about $32 and from September 2018 through December 2020 for the 2-pack for about $40.

Ubio Labs power banks

Costco stores nationwide and online at www.costco.com from March 2019 through December 2020 for the 1-pack for about $32 and from September 2018 through December 2020 for the 2-pack for about $40.