@Aquila
I don't personally believe in letting it drain to 0 or see any benefit... I'm just saying it shouldn't kill a battery/phone if it happens and far from normal. You do it at the possible expense of longevity to your battery... but it shouldn't kill it. Especially on a new phone.
I see it from this perspective watching my teen and nephews and nieces handle there phones... they are ALWAYS running out of battery by the end of the day lol. They may even carry battery packs and they forget to charge them and those run out and then both their phones and battery packs are run dead. If this is the normal routine for kids... can you imagine how often parents would be going through cellphones per year if they did die so easily because we keep yelling at them, "You let the battery die!" LOL.
If you don't like the USA Today article, there's one by a site called Android Central that basically says what I am just saying too...
www.androidcentral.com/how-take-care-your-phones-battery
"Fully cycling the battery in your phone every once in a while isn't going to break anything. It's not something we recommend you do every day because of that charge cycle life we talked about up the page."