Amazon.com: GGMM D3 Battery Base for D0T 3rd Generation (Not Include Speaker or Power Cord), Portable D0T Battery Base 3rd Gen, Rechargeable D0T 3 Stand Wireless, Up to 8 Hours Playtime, White :
Amazon Echo Dot (3rd Gen) - Charcoal in the Smart Speakers & Displays department at Lowes.com