Almost used DFU tools-exhausted battery!

Yesterday my m6 died in my pocket with earphones unplugged while walking around. I go to turn it on, and nothing but a black screen! Not even a white flash. I plug it in to the computer, and no indication of charging. I thought...brick! So I go to the FAQ and read the DFU section, and download it, install it, but can't get it started, give up to try next day. Well, it's a good thing! First thing in the morning, M6 turned on and shut down indicating low battery power. I'm charging it now.
Whew! The old friend once more flickers with a heartbeat.
Please, for dummys like me, write: Charge your battery in the DFU instructions! It behaved like a brick, yes, even when tethered to the pc.
And...Please don't forget to feed your Meizu.