&gt; The next phone manufacturer that will be able to make a smartphone &#x2F; laptop that can last more than 1 working day on a single charge will rule the world of smart phones.<p>My OnePlus One lasts 2-3 at least. I&#x27;ve never let it run down, but there were a few days when I had its USB cable plugged in backwards (doh!) and was wondering why it didn&#x27;t charge.