Please check out blog article link and product link above for context!
We offer only the advice to be careful. As of now, protecting them with a grill would destroy the aesthetic. But as soon as we invent something that looks beautiful and protects it we will. Of course, if a customer really wants grills on it, we absolutely would add them. Thanks for asking!
The age old battery question - I refer you to a long and winding post on Audio DIY "The Boominator". Do a google search on that and you'll get a ton of info about batteries.
By the way, this is actual sound from the case in real time. Use your headphones for best results in hearing the quality!