Cheap And Discounts GGMM D3 10000mAh Portable Battery Base for Echo Dot (3rd Gen.) Power Bank for Amazon Echo Dot 3 Alexa With 16 Hours Playing Time Wholesale. Buy Directly From Merchant GGMM Official Store. Enjoy ✓Free Shipping Worldwide! ✓90 Days Buyer Protection. ✓Easy Return. ✓Money Back Guarantee.