?Extra-long Battery Life.–10000mAh high capacity external battery keeps your echo dot continuously work for about 10 hours, and 30 hours stand-by time. And with the on-off power button, you could turn it off to avoid power loss when no need. ?Power Bank Function.–With 5V/2.0A output, the battery base also acts as a power bank. If necessary, you can even take the portable battery base outdoor to charge your cellphone or tablet while enjoying music from your Echo. ?Intelligent Battery Charging.–Compared with traditional ones, the intelligent battery management system for the battery base makes it easily and securely to protect the Echo Dot 2 battery from damage when long time charging. ?4 Level LED Indicator.– This battery base has 4 LED indicator lights which will discreetly let you know how much power is charged or left, so you could charge it in time.(0%-25%-50%-75%-100%) ?100% Customer Warranty.– it is committed to 100% satisfaction of our customers, any issue with the product, please don’t hesitate and feel free to contact us. We won’t let our customer waste their money.