【Compatibility】The battery base is compatible with Echo Dot 3rd Gen. Not compatible with Echo Dot 5th Gen or Echo Dot 4th Gen. Only a battery base, do not include device. 【Really Makes A DOT 3 Portable】Convenient way to take your DOT on the go. Makes moving your Dot from place to place easily. You can take Echo Dot 3rd gen battery base outside and enjoy a game or control your smart home. 【Long Lasting Battery Life】Unlike others less than 5000mAh, PlusAcc battery base has 10000mAh battery capacity which is 2 TIMES LARGER than others. Echo Dot 3 battery pack has up to 16 hours portable play time (50% volume）and up to 24 hours standby time. Built in power management, so leaving Dot 3 in the battery base at all times doesn't damage the battery. 【Better Sound Performance】Turn Echo Dot 3 into a sort of Bluetooth speaker, so you can have great stereo sound anywhere you want now. Doesn't block speaker. No loss in sound quality, just a great addition to the dot. 【Elegant & Minimal Design】Simple to use, snug and secure. Easy to pick up and move. Just insert the dot into the portable Echo dot 3rd gen battery base. All slots are perfectly aligned. Works well with your Echo Dot 3 and the hold and grip amazing. 【Extends the Usefulness of Dot 3】Wonderful addition. You can move Echo Dot 3 charger base to the bedroom/ kitchen/ family room/ garage and even through the bathroom! You can also throw Dot 3rd gen battery in tote and take to the park to enjoy music. Features: Battery Base: for Echo Dot 3rd Gen Available Color: Black, White Battery Capacity: 10000mAh Packing List: 1 x Battery Base (Not contain Power Adapter and Echo Dot 3rd Generation) Note: Please use the original echo dot 3 charger to charge the battery base.