Echo Dot Battery Case
thingiverse
This is a portable power pack for your Echo Dot, so you can take Alexa anywhere you go. A 2000mAh battery gives you a decent battery life of around 4 hours or more. To turn this into a fully functional portable charger, you'll need to add just a few electronic components: a male micro-USB plug, a TP4056 charge/protection IC, a boost converter, a flat LiPolymer battery (similar to those found in cellphones), and a cable. You may also need to sand down the back slightly to fit the plug securely. Feel free to modify my Fusion360 file as needed.
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