This is the longest lasting battery solution for the Amazon Echo. The MegaBootTM battery will allow you use your Amazon Echo anywhere* with up to 18 hours of battery life. It's intended for people that like to move their Amazon Echo -- maybe take it to a friend's house, to the beach, a park. You name it. Bring it to work, workout sessions. It will give you up to 18 hours of freedom from your power cord. It will charge using the supplied power/adapter. Your package will consist of 2 items. The MegaBootTM battery and the power adapter. Charging time will take from 2 1/2 to 3 hours. Your Echo can be used while it charges. Once it is completely charged, the battery will not drain when your Amazon Echo is plugged in, it uses an intelligent battery management protection system. The MegaBootTM fits snug to the bottom of your Amazon Echo, once it is clipped on, you won't notice it is there. *Amazon Echo works using a wi-fi connection or Bluetooth where available. Refer to your Amazon Echo's instructions for help. | Echo not Included If you need extra Power/Charger https://www.amazon.com/dp/B01JH61J4S

• The most Powerfull battery for Amazon Echo| Up to 18 hours of battery life with your favorite music playing | Smart fast charging around 3 1/2 hours | Only High Quality Cells (Not Chinese cells)

The most Powerfull battery for Amazon Echo| Up to 18 hours of battery life with your favorite music playing | Smart fast charging around 3 1/2 hours | Only High Quality Cells (Not Chinese cells)Koozie LLC